51516565707 has 16 divisors (see below), whose sum is σ = 69381886752. Its totient is φ = 33997939200.

The previous prime is 51516565699. The next prime is 51516565739. The reversal of 51516565707 is 70756561515.

It is not a de Polignac number, because 51516565707 - 2³ = 51516565699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51516565307) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2028693 + ... + 2053929.

It is an arithmetic number, because the mean of its divisors is an integer number (4336367922).

Almost surely, 2^51516565707 is an apocalyptic number.

51516565707 is a deficient number, since it is larger than the sum of its proper divisors (17865321045).

51516565707 is a wasteful number, since it uses less digits than its factorization.

51516565707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32078.

The product of its (nonzero) digits is 1102500, while the sum is 48.

The spelling of 51516565707 in words is "fifty-one billion, five hundred sixteen million, five hundred sixty-five thousand, seven hundred seven".