51971518944 has 48 divisors (see below), whose sum is σ = 151583599440. Its totient is φ = 17323839360.

The previous prime is 51971518933. The next prime is 51971518969. The reversal of 51971518944 is 44981517915.

51971518944 is a `hidden beast` number, since 5 + 19 + 71 + 518 + 9 + 44 = 666.

51971518944 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30075247 + ... + 30076974.

It is an arithmetic number, because the mean of its divisors is an integer number (3157991655).

Almost surely, 2^51971518944 is an apocalyptic number.

51971518944 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

51971518944 is an abundant number, since it is smaller than the sum of its proper divisors (99612080496).

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

51971518944 is a wasteful number, since it uses less digits than its factorization.

51971518944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60152240 (or 60152226 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 54.

The spelling of 51971518944 in words is "fifty-one billion, nine hundred seventy-one million, five hundred eighteen thousand, nine hundred forty-four".