51687300916 has 12 divisors (see below), whose sum is σ = 92658942180. Its totient is φ = 25213317440.

The previous prime is 51687300869. The next prime is 51687300937. The reversal of 51687300916 is 61900378615.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 28093112100 + 23594188816 = 167610^2 + 153604^2 .

It is a super-2 number, since 2×51687300916² (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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157583071 + ... + 157583398.

It is an arithmetic number, because the mean of its divisors is an integer number (7721578515).

Almost surely, 2^51687300916 is an apocalyptic number.

It is an amenable number.

51687300916 is a deficient number, since it is larger than the sum of its proper divisors (40971641264).

51687300916 is a wasteful number, since it uses less digits than its factorization.

51687300916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315166514 (or 315166512 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 46.

The spelling of 51687300916 in words is "fifty-one billion, six hundred eighty-seven million, three hundred thousand, nine hundred sixteen".