16151616

16151616 is an eight-digit decimal integer obtained by concatenating the integers 1615 and 1616, producing the value 16,151,616. As a concatenation of two consecutive four-digit numbers, it has the simple structural property that splitting the number into the first four digits and the last four digits yields 1615 and 1616, which are successive integers.

Numerically, 16151616 is composite. It is even and, in fact, divisible by 64 because the last four digits 1616 are divisible by 16 and the overall factorization shows a power of two of six. The full prime factorization is 2^6 × 3^3 × 13 × 719. Equivalently, 16151616 = 64 × 27 × 13 × 719.

In relation to powers of two, 16151616 is close to 2^24 (16,777,216); it differs from that value by 625,600. It is not a perfect square, cube, or other simple power, and it does not have notable primality properties beyond its factorization.

The number is primarily of interest as a decimal curiosity arising from concatenation. It serves as an example of how concatenating consecutive integers can yield a unique, easily described integer with a simple factorization. See also numbers formed by concatenation or the study of concatenated integers in decimal representations.