51317852667904 has 51 divisors (see below), whose sum is σ = 102638590178383. Its totient is φ = 25658009387008.

The previous prime is 51317852667901. The next prime is 51317852667941. The reversal of 51317852667904 is 40976625871315.

The square root of 51317852667904 is 7163648.

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

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51317852667901) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1833879897 + ... + 1833907879.

It is a 1-persistent number, because it is pandigital, but 2⋅51317852667904 = 102635705335808 is not.

Almost surely, 2^{51317852667904} is an apocalyptic number.

51317852667904 is the 7163648-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51317852667904

51317852667904 is an abundant number, since it is smaller than the sum of its proper divisors (51320737510479).

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

51317852667904 is an frugal number, since it uses more digits than its factorization.

51317852667904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55998 (or 27985 counting only the distinct ones).

The product of its (nonzero) digits is 76204800, while the sum is 64.

51317852667904 divided by its sum of digits (64) gives a square (801841447936 = 895456²).

The spelling of 51317852667904 in words is "fifty-one trillion, three hundred seventeen billion, eight hundred fifty-two million, six hundred sixty-seven thousand, nine hundred four".