2156533815264 has 48 divisors (see below), whose sum is σ = 5843510991360. Its totient is φ = 695656068480.

The previous prime is 2156533815229. The next prime is 2156533815277. The reversal of 2156533815264 is 4625183356512.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent 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, 362317894 + ... + 362323845.

It is an arithmetic number, because the mean of its divisors is an integer number (121739812320).

Almost surely, 2^{2156533815264} is an apocalyptic number.

2156533815264 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2156533815264 is an abundant number, since it is smaller than the sum of its proper divisors (3686977176096).

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

2156533815264 is a wasteful number, since it uses less digits than its factorization.

2156533815264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724641783 (or 724641775 counting only the distinct ones).

The product of its digits is 5184000, while the sum is 51.

The spelling of 2156533815264 in words is "two trillion, one hundred fifty-six billion, five hundred thirty-three million, eight hundred fifteen thousand, two hundred sixty-four".