51871044720495 has 128 divisors (see below), whose sum is σ = 117986890291200. Its totient is φ = 18728077639680.

The previous prime is 51871044720457. The next prime is 51871044720511. The reversal of 51871044720495 is 59402744017815.

It is not a de Polignac number, because 51871044720495 - 2⁶ = 51871044720431 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 101351070 + ... + 101861579.

It is an arithmetic number, because the mean of its divisors is an integer number (921772580400).

Almost surely, 2^{51871044720495} is an apocalyptic number.

51871044720495 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51871044720495 is an abundant number, since it is smaller than the sum of its proper divisors (66115845570705).

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

51871044720495 is a wasteful number, since it uses less digits than its factorization.

51871044720495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203212705.

The product of its (nonzero) digits is 11289600, while the sum is 57.

The spelling of 51871044720495 in words is "fifty-one trillion, eight hundred seventy-one billion, forty-four million, seven hundred twenty thousand, four hundred ninety-five".