51745602500 has 30 divisors (see below), whose sum is σ = 113157289014. Its totient is φ = 20698240000.

The previous prime is 51745602499. The next prime is 51745602511. The reversal of 51745602500 is 520654715.

It can be written as a sum of positive squares in 5 ways, for example, as 29614279744 + 22131322756 = 172088^2 + 148766^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 10346621 + ... + 10351620.

Almost surely, 2^51745602500 is an apocalyptic number.

51745602500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51745602500 is an abundant number, since it is smaller than the sum of its proper divisors (61411686514).

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

51745602500 is a wasteful number, since it uses less digits than its factorization.

51745602500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20698265 (or 20698248 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 35.

The spelling of 51745602500 in words is "fifty-one billion, seven hundred forty-five million, six hundred two thousand, five hundred".