13261634056 has 32 divisors (see below), whose sum is σ = 27130528800. Its totient is φ = 6027024640.

The previous prime is 13261634047. The next prime is 13261634059. The reversal of 13261634056 is 65043616231.

It is a super-2 number, since 2×13261634056² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13261634059) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 938016 + ... + 952048.

It is an arithmetic number, because the mean of its divisors is an integer number (847829025).

Almost surely, 2^13261634056 is an apocalyptic number.

It is an amenable number.

13261634056 is an abundant number, since it is smaller than the sum of its proper divisors (13868894744).

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

13261634056 is a wasteful number, since it uses less digits than its factorization.

13261634056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24789 (or 24785 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 37.

The spelling of 13261634056 in words is "thirteen billion, two hundred sixty-one million, six hundred thirty-four thousand, fifty-six".