21609736352352 has 36 divisors (see below), whose sum is σ = 61452687752820. Its totient is φ = 7203245450688.

The previous prime is 21609736352291. The next prime is 21609736352389. The reversal of 21609736352352 is 25325363790612.

21609736352352 is a `hidden beast` number, since 2 + 1 + 6 + 0 + 9 + 7 + 3 + 63 + 523 + 52 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37516903102 + ... + 37516903677.

It is an arithmetic number, because the mean of its divisors is an integer number (1707019104245).

Almost surely, 2^{21609736352352} is an apocalyptic number.

It is an amenable number.

21609736352352 is an abundant number, since it is smaller than the sum of its proper divisors (39842951400468).

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

21609736352352 is a wasteful number, since it uses less digits than its factorization.

21609736352352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75033806795 (or 75033806784 counting only the distinct ones).

The product of its (nonzero) digits is 12247200, while the sum is 54.

The spelling of 21609736352352 in words is "twenty-one trillion, six hundred nine billion, seven hundred thirty-six million, three hundred fifty-two thousand, three hundred fifty-two".