51388930168560 has 60 divisors (see below), whose sum is σ = 172581157151832. Its totient is φ = 13703714711424.

The previous prime is 51388930168559. The next prime is 51388930168561. The reversal of 51388930168560 is 6586103988315.

51388930168560 is a `hidden beast` number, since 5 + 1 + 3 + 8 + 8 + 9 + 3 + 0 + 1 + 68 + 560 = 666.

It is an interprime number because it is at equal distance from previous prime (51388930168559) and next prime (51388930168561).

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-2 number, since 2×51388930168560² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51388930168561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35686756342 + ... + 35686757781.

Almost surely, 2^{51388930168560} is an apocalyptic number.

It is an amenable number.

51388930168560 is an abundant number, since it is smaller than the sum of its proper divisors (121192226983272).

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

51388930168560 is a wasteful number, since it uses less digits than its factorization.

51388930168560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71373514142 (or 71373514133 counting only the distinct ones).

The product of its (nonzero) digits is 37324800, while the sum is 63.

The spelling of 51388930168560 in words is "fifty-one trillion, three hundred eighty-eight billion, nine hundred thirty million, one hundred sixty-eight thousand, five hundred sixty".