51939885312 has 576 divisors, whose sum is σ = 184234713600. Its totient is φ = 14296891392.

The previous prime is 51939885241. The next prime is 51939885329. The reversal of 51939885312 is 21358893915.

51939885312 is a `hidden beast` number, since 5 + 19 + 3 + 98 + 8 + 531 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

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

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 113653788 + ... + 113654244.

Almost surely, 2^51939885312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51939885312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92117356800).

51939885312 is an abundant number, since it is smaller than the sum of its proper divisors (132294828288).

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

51939885312 is an frugal number, since it uses more digits than its factorization.

51939885312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530 (or 498 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 54.

The spelling of 51939885312 in words is "fifty-one billion, nine hundred thirty-nine million, eight hundred eighty-five thousand, three hundred twelve".