21604664601512 has 128 divisors (see below), whose sum is σ = 43027967232000. Its totient is φ = 10149269222400.

The previous prime is 21604664601497. The next prime is 21604664601529. The reversal of 21604664601512 is 21510646640612.

It is a super-2 number, since 2×21604664601512² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1539993314 + ... + 1540007342.

It is an arithmetic number, because the mean of its divisors is an integer number (336155994000).

Almost surely, 2^{21604664601512} is an apocalyptic number.

It is an amenable number.

21604664601512 is a deficient number, since it is larger than the sum of its proper divisors (21423302630488).

21604664601512 is a wasteful number, since it uses less digits than its factorization.

21604664601512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14811 (or 14807 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 44.

The spelling of 21604664601512 in words is "twenty-one trillion, six hundred four billion, six hundred sixty-four million, six hundred one thousand, five hundred twelve".