51927139981584 has 120 divisors (see below), whose sum is σ = 171441986074112. Its totient is φ = 14357734548480.

The previous prime is 51927139981571. The next prime is 51927139981667. The reversal of 51927139981584 is 48518993172915.

51927139981584 is a `hidden beast` number, since 5 + 1 + 9 + 2 + 7 + 1 + 39 + 9 + 8 + 1 + 584 = 666.

51927139981584 is digitally balanced in base 8, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 830856169 + ... + 830918664.

Almost surely, 2^{51927139981584} is an apocalyptic number.

It is an amenable number.

51927139981584 is an abundant number, since it is smaller than the sum of its proper divisors (119514846092528).

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

51927139981584 is a wasteful number, since it uses less digits than its factorization.

51927139981584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1661774885 (or 1661774876 counting only the distinct ones).

The product of its digits is 195955200, while the sum is 72.

The spelling of 51927139981584 in words is "fifty-one trillion, nine hundred twenty-seven billion, one hundred thirty-nine million, nine hundred eighty-one thousand, five hundred eighty-four".