51931678676 has 48 divisors (see below), whose sum is σ = 97166300112. Its totient is φ = 24200601600.

The previous prime is 51931678639. The next prime is 51931678697. The reversal of 51931678676 is 67687613915.

It can be written as a sum of positive squares in 8 ways, for example, as 1878355600 + 50053323076 = 43340^2 + 223726^2 .

It is a super-2 number, since 2×51931678676² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3915416 + ... + 3928656.

It is an arithmetic number, because the mean of its divisors is an integer number (2024297919).

Almost surely, 2^51931678676 is an apocalyptic number.

It is an amenable number.

51931678676 is a deficient number, since it is larger than the sum of its proper divisors (45234621436).

51931678676 is a wasteful number, since it uses less digits than its factorization.

51931678676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13820 (or 13818 counting only the distinct ones).

The product of its digits is 11430720, while the sum is 59.

The spelling of 51931678676 in words is "fifty-one billion, nine hundred thirty-one million, six hundred seventy-eight thousand, six hundred seventy-six".