51857088768 has 54 divisors (see below), whose sum is σ = 149516777774. Its totient is φ = 17285695488.

The previous prime is 51857088739. The next prime is 51857088769. The reversal of 51857088768 is 86788075815.

51857088768 is a `hidden beast` number, since 51 + 8 + 570 + 8 + 8 + 7 + 6 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 37959508224 + 13897580544 = 194832^2 + 117888^2 .

It is not an unprimeable number, because it can be changed into a prime (51857088769) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11251405 + ... + 11256012.

Almost surely, 2^51857088768 is an apocalyptic number.

It is an amenable number.

51857088768 is an abundant number, since it is smaller than the sum of its proper divisors (97659689006).

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

51857088768 is a wasteful number, since it uses less digits than its factorization.

51857088768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22507439 (or 22507422 counting only the distinct ones).

The product of its (nonzero) digits is 30105600, while the sum is 63.

The spelling of 51857088768 in words is "fifty-one billion, eight hundred fifty-seven million, eighty-eight thousand, seven hundred sixty-eight".