13256013565553 has 32 divisors (see below), whose sum is σ = 14915724912000. Its totient is φ = 11678569177600.

The previous prime is 13256013565499. The next prime is 13256013565573. The reversal of 13256013565553 is 35556531065231.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 13256013565553 - 2²² = 13256009371249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13256013565573) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15122933 + ... + 15975453.

It is an arithmetic number, because the mean of its divisors is an integer number (466116403500).

Almost surely, 2^{13256013565553} is an apocalyptic number.

It is an amenable number.

13256013565553 is a deficient number, since it is larger than the sum of its proper divisors (1659711346447).

13256013565553 is a wasteful number, since it uses less digits than its factorization.

13256013565553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852913.

The product of its (nonzero) digits is 6075000, while the sum is 50.

The spelling of 13256013565553 in words is "thirteen trillion, two hundred fifty-six billion, thirteen million, five hundred sixty-five thousand, five hundred fifty-three".