51931313676 has 96 divisors (see below), whose sum is σ = 147349762560. Its totient is φ = 15686049600.

The previous prime is 51931313657. The next prime is 51931313683. The reversal of 51931313676 is 67631313915.

51931313676 is a `hidden beast` number, since 519 + 3 + 1 + 31 + 36 + 76 = 666.

It is a super-2 number, since 2×51931313676² (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 31 ways as a sum of consecutive naturals, for example, 299190 + ... + 439746.

It is an arithmetic number, because the mean of its divisors is an integer number (1534893360).

Almost surely, 2^51931313676 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51931313676, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73674881280).

51931313676 is an abundant number, since it is smaller than the sum of its proper divisors (95418448884).

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

51931313676 is a wasteful number, since it uses less digits than its factorization.

51931313676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140892 (or 140884 counting only the distinct ones).

The product of its digits is 306180, while the sum is 45.

The spelling of 51931313676 in words is "fifty-one billion, nine hundred thirty-one million, three hundred thirteen thousand, six hundred seventy-six".