3991574612664 has 96 divisors (see below), whose sum is σ = 10826975128320. Its totient is φ = 1328500312128.

The previous prime is 3991574612537. The next prime is 3991574612677. The reversal of 3991574612664 is 4662164751993.

It is a happy number.

3991574612664 is a `hidden beast` number, since 3 + 9 + 9 + 1 + 5 + 7 + 4 + 612 + 6 + 6 + 4 = 666.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 160015377 + ... + 160040319.

It is an arithmetic number, because the mean of its divisors is an integer number (112780990920).

Almost surely, 2^{3991574612664} is an apocalyptic number.

It is an amenable number.

3991574612664 is an abundant number, since it is smaller than the sum of its proper divisors (6835400515656).

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

3991574612664 is a wasteful number, since it uses less digits than its factorization.

3991574612664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28249 (or 28242 counting only the distinct ones).

The product of its digits is 58786560, while the sum is 63.

The spelling of 3991574612664 in words is "three trillion, nine hundred ninety-one billion, five hundred seventy-four million, six hundred twelve thousand, six hundred sixty-four".