13040568256 has 28 divisors (see below), whose sum is σ = 26144167168. Its totient is φ = 6453061632.

The previous prime is 13040568217. The next prime is 13040568259. The reversal of 13040568256 is 65286504031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13040568259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1044096 + ... + 1056511.

It is an arithmetic number, because the mean of its divisors is an integer number (933720256).

Almost surely, 2^13040568256 is an apocalyptic number.

13040568256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13040568256 is an abundant number, since it is smaller than the sum of its proper divisors (13103598912).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13040568256 is an equidigital number, since it uses as much as digits as its factorization.

13040568256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2100716 (or 2100706 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 13040568256 in words is "thirteen billion, forty million, five hundred sixty-eight thousand, two hundred fifty-six".