51020525553 has 8 divisors (see below), whose sum is σ = 68028429216. Its totient is φ = 34013152800.

The previous prime is 51020525513. The next prime is 51020525581. The reversal of 51020525553 is 35552502015.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-51020525553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51020525513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 245418 + ... + 402828.

It is an arithmetic number, because the mean of its divisors is an integer number (8503553652).

Almost surely, 2^51020525553 is an apocalyptic number.

It is an amenable number.

51020525553 is a deficient number, since it is larger than the sum of its proper divisors (17007903663).

51020525553 is a wasteful number, since it uses less digits than its factorization.

51020525553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265455.

The product of its (nonzero) digits is 37500, while the sum is 33.

The spelling of 51020525553 in words is "fifty-one billion, twenty million, five hundred twenty-five thousand, five hundred fifty-three".