51310400464 has 20 divisors (see below), whose sum is σ = 99467036356. Its totient is φ = 25641487872.

The previous prime is 51310400419. The next prime is 51310400483. The reversal of 51310400464 is 46400401315.

It can be written as a sum of positive squares in 2 ways, for example, as 2257010064 + 49053390400 = 47508^2 + 221480^2 .

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 3 ways as a sum of consecutive naturals, for example, 826119 + ... + 886054.

Almost surely, 2^51310400464 is an apocalyptic number.

It is an amenable number.

51310400464 is a deficient number, since it is larger than the sum of its proper divisors (48156635892).

51310400464 is a wasteful number, since it uses less digits than its factorization.

51310400464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1714054 (or 1714048 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 51310400464 its reverse (46400401315), we get a palindrome (97710801779).

The spelling of 51310400464 in words is "fifty-one billion, three hundred ten million, four hundred thousand, four hundred sixty-four".