13565523264 has 56 divisors (see below), whose sum is σ = 35950977120. Its totient is φ = 4514425344.

The previous prime is 13565523259. The next prime is 13565523281. The reversal of 13565523264 is 46232556531.

It is a happy number.

It is a super-2 number, since 2×13565523264² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60067 + ... + 175325.

Almost surely, 2^13565523264 is an apocalyptic number.

It is an amenable number.

13565523264 is an abundant number, since it is smaller than the sum of its proper divisors (22385453856).

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

13565523264 is a wasteful number, since it uses less digits than its factorization.

13565523264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115887 (or 115877 counting only the distinct ones).

The product of its digits is 648000, while the sum is 42.

The spelling of 13565523264 in words is "thirteen billion, five hundred sixty-five million, five hundred twenty-three thousand, two hundred sixty-four".