51587765924 has 12 divisors (see below), whose sum is σ = 90281910348. Its totient is φ = 25792934400.

The previous prime is 51587765909. The next prime is 51587765947. The reversal of 51587765924 is 42956778515.

It can be written as a sum of positive squares in 2 ways, for example, as 43580737600 + 8007028324 = 208760^2 + 89482^2 .

It is a super-2 number, since 2×51587765924² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106817 + ... + 338504.

It is an arithmetic number, because the mean of its divisors is an integer number (7523492529).

Almost surely, 2^51587765924 is an apocalyptic number.

It is an amenable number.

51587765924 is a deficient number, since it is larger than the sum of its proper divisors (38694144424).

51587765924 is a wasteful number, since it uses less digits than its factorization.

51587765924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474286 (or 474284 counting only the distinct ones).

The product of its digits is 21168000, while the sum is 59.

The spelling of 51587765924 in words is "fifty-one billion, five hundred eighty-seven million, seven hundred sixty-five thousand, nine hundred twenty-four".