5631912864 has 72 divisors (see below), whose sum is σ = 16957870020. Its totient is φ = 1766873088.

The previous prime is 5631912841. The next prime is 5631912893. The reversal of 5631912864 is 4682191365.

5631912864 is a `hidden beast` number, since 5 + 631 + 9 + 1 + 2 + 8 + 6 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5462392464 + 169520400 = 73908^2 + 13020^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 570259 + ... + 580050.

Almost surely, 2^5631912864 is an apocalyptic number.

It is an amenable number.

5631912864 is an abundant number, since it is smaller than the sum of its proper divisors (11325957156).

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

5631912864 is a wasteful number, since it uses less digits than its factorization.

5631912864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1150342 (or 1150331 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 5631912864 is about 75046.0716093787. The cubic root of 5631912864 is about 1779.1748968054.

The spelling of 5631912864 in words is "five billion, six hundred thirty-one million, nine hundred twelve thousand, eight hundred sixty-four".