2156513013264 has 40 divisors (see below), whose sum is σ = 5654141092960. Its totient is φ = 708108749568.

The previous prime is 2156513013253. The next prime is 2156513013301. The reversal of 2156513013264 is 4623103156512.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335275549 + ... + 335281980.

It is an arithmetic number, because the mean of its divisors is an integer number (141353527324).

Almost surely, 2^{2156513013264} is an apocalyptic number.

2156513013264 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2156513013264 is an abundant number, since it is smaller than the sum of its proper divisors (3497628079696).

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

2156513013264 is a wasteful number, since it uses less digits than its factorization.

2156513013264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670557607 (or 670557601 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

Adding to 2156513013264 its reverse (4623103156512), we get a palindrome (6779616169776).

The spelling of 2156513013264 in words is "two trillion, one hundred fifty-six billion, five hundred thirteen million, thirteen thousand, two hundred sixty-four".