21650156001604 has 96 divisors (see below), whose sum is σ = 42190001086464. Its totient is φ = 9653623234560.

The previous prime is 21650156001601. The next prime is 21650156001613. The reversal of 21650156001604 is 40610065105612.

It is not an unprimeable number, because it can be changed into a prime (21650156001601) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3829849642 + ... + 3829855294.

It is an arithmetic number, because the mean of its divisors is an integer number (439479177984).

Almost surely, 2^{21650156001604} is an apocalyptic number.

It is an amenable number.

21650156001604 is a deficient number, since it is larger than the sum of its proper divisors (20539845084860).

21650156001604 is a wasteful number, since it uses less digits than its factorization.

21650156001604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9317 (or 9315 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 37.

The spelling of 21650156001604 in words is "twenty-one trillion, six hundred fifty billion, one hundred fifty-six million, one thousand, six hundred four".