50640894752 has 54 divisors (see below), whose sum is σ = 115997103243. Its totient is φ = 21699421632.

The previous prime is 50640894739. The next prime is 50640894767. The reversal of 50640894752 is 25749804605.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 25320447376 + 25320447376 = 159124^2 + 159124^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=159124.

It is a super-2 number, since 2×50640894752² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 50640894752.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 8908103 + ... + 8913785.

Almost surely, 2^50640894752 is an apocalyptic number.

It is an amenable number.

50640894752 is an abundant number, since it is smaller than the sum of its proper divisors (65356208491).

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

50640894752 is an frugal number, since it uses more digits than its factorization.

50640894752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11390 (or 5692 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 50.

Multiplying 50640894752 by its sum of digits (50), we get a square (2532044737600 = 1591240²).

The spelling of 50640894752 in words is "fifty billion, six hundred forty million, eight hundred ninety-four thousand, seven hundred fifty-two".