51444631372872 has 64 divisors (see below), whose sum is σ = 129267509152320. Its totient is φ = 17060757179648.

The previous prime is 51444631372867. The next prime is 51444631372891. The reversal of 51444631372872 is 27827313644415.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 248906278 + ... + 249112874.

It is an arithmetic number, because the mean of its divisors is an integer number (2019804830505).

Almost surely, 2^{51444631372872} is an apocalyptic number.

It is an amenable number.

51444631372872 is an abundant number, since it is smaller than the sum of its proper divisors (77822877779448).

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

51444631372872 is a wasteful number, since it uses less digits than its factorization.

51444631372872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259470 (or 259466 counting only the distinct ones).

The product of its digits is 27095040, while the sum is 57.

The spelling of 51444631372872 in words is "fifty-one trillion, four hundred forty-four billion, six hundred thirty-one million, three hundred seventy-two thousand, eight hundred seventy-two".