51559801590 has 64 divisors (see below), whose sum is σ = 136187661312. Its totient is φ = 12388723200.

The previous prime is 51559801577. The next prime is 51559801651. The reversal of 51559801590 is 9510895515.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 654046 + ... + 728625.

It is an arithmetic number, because the mean of its divisors is an integer number (2127932208).

Almost surely, 2^51559801590 is an apocalyptic number.

51559801590 is an abundant number, since it is smaller than the sum of its proper divisors (84627859722).

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

51559801590 is a wasteful number, since it uses less digits than its factorization.

51559801590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1382805.

The product of its (nonzero) digits is 405000, while the sum is 48.

The spelling of 51559801590 in words is "fifty-one billion, five hundred fifty-nine million, eight hundred one thousand, five hundred ninety".