51313663512 has 32 divisors (see below), whose sum is σ = 142537954800. Its totient is φ = 17104554432.

The previous prime is 51313663501. The next prime is 51313663537. The reversal of 51313663512 is 21536631315.

51313663512 is a `hidden beast` number, since 5 + 1 + 3 + 1 + 3 + 6 + 635 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 118781413 + ... + 118781844.

Almost surely, 2^51313663512 is an apocalyptic number.

It is an amenable number.

51313663512 is an abundant number, since it is smaller than the sum of its proper divisors (91224291288).

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

51313663512 is a wasteful number, since it uses less digits than its factorization.

51313663512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237563272 (or 237563262 counting only the distinct ones).

The product of its digits is 48600, while the sum is 36.

The spelling of 51313663512 in words is "fifty-one billion, three hundred thirteen million, six hundred sixty-three thousand, five hundred twelve".