51672540384 has 48 divisors (see below), whose sum is σ = 150711578640. Its totient is φ = 17224179840.

The previous prime is 51672540313. The next prime is 51672540401. The reversal of 51672540384 is 48304527615.

51672540384 is a `hidden beast` number, since 5 + 1 + 6 + 72 + 540 + 38 + 4 = 666.

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

It is a super-2 number, since 2×51672540384² (a number of 22 digits) contains 22 as substring.

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, 29902227 + ... + 29903954.

It is an arithmetic number, because the mean of its divisors is an integer number (3139824555).

Almost surely, 2^51672540384 is an apocalyptic number.

51672540384 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

51672540384 is an abundant number, since it is smaller than the sum of its proper divisors (99039038256).

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

51672540384 is a wasteful number, since it uses less digits than its factorization.

51672540384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59806200 (or 59806186 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

The spelling of 51672540384 in words is "fifty-one billion, six hundred seventy-two million, five hundred forty thousand, three hundred eighty-four".