21656160152 has 16 divisors (see below), whose sum is σ = 44296691400. Its totient is φ = 9843709120.

The previous prime is 21656160139. The next prime is 21656160167. The reversal of 21656160152 is 25106165612.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123046277 + ... + 123046452.

Almost surely, 2^21656160152 is an apocalyptic number.

21656160152 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21656160152 is an abundant number, since it is smaller than the sum of its proper divisors (22640531248).

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

21656160152 is a wasteful number, since it uses less digits than its factorization.

21656160152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246092746 (or 246092742 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 35.

The spelling of 21656160152 in words is "twenty-one billion, six hundred fifty-six million, one hundred sixty thousand, one hundred fifty-two".