2156013520525 has 12 divisors (see below), whose sum is σ = 2679230984512. Its totient is φ = 1721085513840.

The previous prime is 2156013520499. The next prime is 2156013520589. The reversal of 2156013520525 is 5250253106512.

It is a de Polignac number, because none of the positive numbers 2^k-2156013520525 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 93120759 + ... + 93143908.

Almost surely, 2^{2156013520525} is an apocalyptic number.

2156013520525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2156013520525 is a deficient number, since it is larger than the sum of its proper divisors (523217463987).

2156013520525 is a wasteful number, since it uses less digits than its factorization.

2156013520525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186265140 (or 186265135 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 37.

The spelling of 2156013520525 in words is "two trillion, one hundred fifty-six billion, thirteen million, five hundred twenty thousand, five hundred twenty-five".