51868579392 has 336 divisors, whose sum is σ = 176734451712. Its totient is φ = 14775022080.

The previous prime is 51868579339. The next prime is 51868579409. The reversal of 51868579392 is 29397586815.

51868579392 is a `hidden beast` number, since 51 + 8 + 6 + 8 + 579 + 3 + 9 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (336).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 56935417 + ... + 56936327.

It is an arithmetic number, because the mean of its divisors is an integer number (525995392).

Almost surely, 2^51868579392 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 51868579392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88367225856).

51868579392 is an abundant number, since it is smaller than the sum of its proper divisors (124865872320).

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

51868579392 is an equidigital number, since it uses as much as digits as its factorization.

51868579392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1468 (or 1446 counting only the distinct ones).

The product of its digits is 32659200, while the sum is 63.

The spelling of 51868579392 in words is "fifty-one billion, eight hundred sixty-eight million, five hundred seventy-nine thousand, three hundred ninety-two".