51902400373521 has 64 divisors (see below), whose sum is σ = 76066976563200. Its totient is φ = 31337010017280.

The previous prime is 51902400373507. The next prime is 51902400373543. The reversal of 51902400373521 is 12537300420915.

It is not a de Polignac number, because 51902400373521 - 2¹⁹ = 51902399849233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51902400373501) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 492955335 + ... + 493060611.

It is an arithmetic number, because the mean of its divisors is an integer number (1188546508800).

Almost surely, 2^{51902400373521} is an apocalyptic number.

51902400373521 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

51902400373521 is a deficient number, since it is larger than the sum of its proper divisors (24164576189679).

51902400373521 is a wasteful number, since it uses less digits than its factorization.

51902400373521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107094.

The product of its (nonzero) digits is 226800, while the sum is 42.

The spelling of 51902400373521 in words is "fifty-one trillion, nine hundred two billion, four hundred million, three hundred seventy-three thousand, five hundred twenty-one".