51587943564 has 24 divisors (see below), whose sum is σ = 125605428480. Its totient is φ = 16448329744.

The previous prime is 51587943559. The next prime is 51587943593. The reversal of 51587943564 is 46534978515.

It is a super-2 number, since 2×51587943564² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93456144 + ... + 93456695.

It is an arithmetic number, because the mean of its divisors is an integer number (5233559520).

Almost surely, 2^51587943564 is an apocalyptic number.

It is an amenable number.

51587943564 is an abundant number, since it is smaller than the sum of its proper divisors (74017484916).

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

51587943564 is a wasteful number, since it uses less digits than its factorization.

51587943564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186912869 (or 186912867 counting only the distinct ones).

The product of its digits is 18144000, while the sum is 57.

The spelling of 51587943564 in words is "fifty-one billion, five hundred eighty-seven million, nine hundred forty-three thousand, five hundred sixty-four".