50781134864 has 20 divisors (see below), whose sum is σ = 101781154860. Its totient is φ = 24515030400.

The previous prime is 50781134827. The next prime is 50781134879. The reversal of 50781134864 is 46843118705.

It can be written as a sum of positive squares in 2 ways, for example, as 13878724864 + 36902410000 = 117808^2 + 192100^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54720587 + ... + 54721514.

It is an arithmetic number, because the mean of its divisors is an integer number (5089057743).

Almost surely, 2^50781134864 is an apocalyptic number.

It is an amenable number.

50781134864 is an abundant number, since it is smaller than the sum of its proper divisors (51000019996).

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

50781134864 is a wasteful number, since it uses less digits than its factorization.

50781134864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109442138 (or 109442132 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 47.

The spelling of 50781134864 in words is "fifty billion, seven hundred eighty-one million, one hundred thirty-four thousand, eight hundred sixty-four".