51561050896 has 20 divisors (see below), whose sum is σ = 100218713692. Its totient is φ = 25698157056.

The previous prime is 51561050867. The next prime is 51561050897. The reversal of 51561050896 is 69805016515.

It can be written as a sum of positive squares in 2 ways, for example, as 9050858496 + 42510192400 = 95136^2 + 206180^2 .

It is not an unprimeable number, because it can be changed into a prime (51561050897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5142861 + ... + 5152876.

Almost surely, 2^51561050896 is an apocalyptic number.

It is an amenable number.

51561050896 is a deficient number, since it is larger than the sum of its proper divisors (48657662796).

51561050896 is a wasteful number, since it uses less digits than its factorization.

51561050896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10296058 (or 10296052 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 46.

The spelling of 51561050896 in words is "fifty-one billion, five hundred sixty-one million, fifty thousand, eight hundred ninety-six".