12768537615 has 16 divisors (see below), whose sum is σ = 20452818048. Its totient is φ = 6802167456.

The previous prime is 12768537557. The next prime is 12768537619. The reversal of 12768537615 is 51673586721.

It is not a de Polignac number, because 12768537615 - 2²² = 12764343311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12768537619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 468769 + ... + 495258.

It is an arithmetic number, because the mean of its divisors is an integer number (1278301128).

Almost surely, 2^12768537615 is an apocalyptic number.

12768537615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12768537615 is a deficient number, since it is larger than the sum of its proper divisors (7684280433).

12768537615 is an equidigital number, since it uses as much as digits as its factorization.

12768537615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964918.

The product of its digits is 2116800, while the sum is 51.

The spelling of 12768537615 in words is "twelve billion, seven hundred sixty-eight million, five hundred thirty-seven thousand, six hundred fifteen".