51982440964 has 6 divisors (see below), whose sum is σ = 90969271694. Its totient is φ = 25991220480.

The previous prime is 51982440959. The next prime is 51982440973. The reversal of 51982440964 is 46904428915.

It can be written as a sum of positive squares in only one way, i.e., 40545849600 + 11436591364 = 201360^2 + 106942^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6497805117 + ... + 6497805124.

Almost surely, 2^51982440964 is an apocalyptic number.

It is an amenable number.

51982440964 is a deficient number, since it is larger than the sum of its proper divisors (38986830730).

51982440964 is a wasteful number, since it uses less digits than its factorization.

51982440964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12995610245 (or 12995610243 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 52.

The spelling of 51982440964 in words is "fifty-one billion, nine hundred eighty-two million, four hundred forty thousand, nine hundred sixty-four".