51171868944 has 135 divisors (see below), whose sum is σ = 166653295653. Its totient is φ = 14615104896.

The previous prime is 51171868931. The next prime is 51171868991. The reversal of 51171868944 is 44986817115.

The square root of 51171868944 is 226212.

It is a perfect power (a square), and thus also a powerful number.

51171868944 is a `hidden beast` number, since 511 + 7 + 1 + 8 + 6 + 89 + 44 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20996010000 + 30175858944 = 144900^2 + 173712^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 19000462 + ... + 19003154.

Almost surely, 2^51171868944 is an apocalyptic number.

51171868944 is the 226212-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51171868944

51171868944 is an abundant number, since it is smaller than the sum of its proper divisors (115481426709).

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

51171868944 is an equidigital number, since it uses as much as digits as its factorization.

51171868944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5414 (or 2705 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 54.

The spelling of 51171868944 in words is "fifty-one billion, one hundred seventy-one million, eight hundred sixty-eight thousand, nine hundred forty-four".