51851731504 has 40 divisors (see below), whose sum is σ = 101255639760. Its totient is φ = 25721468928.

The previous prime is 51851731493. The next prime is 51851731511. The reversal of 51851731504 is 40513715815.

It is a super-2 number, since 2×51851731504² (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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4331992 + ... + 4343944.

It is an arithmetic number, because the mean of its divisors is an integer number (2531390994).

Almost surely, 2^51851731504 is an apocalyptic number.

It is an amenable number.

51851731504 is a deficient number, since it is larger than the sum of its proper divisors (49403908256).

51851731504 is a wasteful number, since it uses less digits than its factorization.

51851731504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14077 (or 14071 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 40.

The spelling of 51851731504 in words is "fifty-one billion, eight hundred fifty-one million, seven hundred thirty-one thousand, five hundred four".