51005095965 has 24 divisors (see below), whose sum is σ = 93061931040. Its totient is φ = 25770995424.

The previous prime is 51005095961. The next prime is 51005095979. The reversal of 51005095965 is 56959050015.

51005095965 is a `hidden beast` number, since 5 + 1 + 0 + 0 + 50 + 9 + 596 + 5 = 666.

It is not a de Polignac number, because 51005095965 - 2² = 51005095961 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 51005095965.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51005095961) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29826687 + ... + 29828396.

It is an arithmetic number, because the mean of its divisors is an integer number (3877580460).

Almost surely, 2^51005095965 is an apocalyptic number.

It is an amenable number.

51005095965 is a deficient number, since it is larger than the sum of its proper divisors (42056835075).

51005095965 is a wasteful number, since it uses less digits than its factorization.

51005095965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59655113 (or 59655110 counting only the distinct ones).

The product of its (nonzero) digits is 303750, while the sum is 45.

The spelling of 51005095965 in words is "fifty-one billion, five million, ninety-five thousand, nine hundred sixty-five".