51335942568 has 32 divisors (see below), whose sum is σ = 128653670400. Its totient is φ = 17070139008.

The previous prime is 51335942561. The next prime is 51335942587. The reversal of 51335942568 is 86524953315.

It is a self number, because there is not a number n which added to its sum of digits gives 51335942568.

It is not an unprimeable number, because it can be changed into a prime (51335942561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2605096 + ... + 2624727.

It is an arithmetic number, because the mean of its divisors is an integer number (4020427200).

Almost surely, 2^51335942568 is an apocalyptic number.

It is an amenable number.

51335942568 is an abundant number, since it is smaller than the sum of its proper divisors (77317727832).

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

51335942568 is a wasteful number, since it uses less digits than its factorization.

51335942568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5230241 (or 5230237 counting only the distinct ones).

The product of its digits is 3888000, while the sum is 51.

The spelling of 51335942568 in words is "fifty-one billion, three hundred thirty-five million, nine hundred forty-two thousand, five hundred sixty-eight".