65631118051 has 4 divisors (see below), whose sum is σ = 69491772072. Its totient is φ = 61770464032.

The previous prime is 65631118027. The next prime is 65631118061. The reversal of 65631118051 is 15081113656.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65631118051 - 2²³ = 65622729443 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65631118051.

It is not an unprimeable number, because it can be changed into a prime (65631118001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1930326985 + ... + 1930327018.

It is an arithmetic number, because the mean of its divisors is an integer number (17372943018).

Almost surely, 2^65631118051 is an apocalyptic number.

65631118051 is a deficient number, since it is larger than the sum of its proper divisors (3860654021).

65631118051 is a wasteful number, since it uses less digits than its factorization.

65631118051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3860654020.

The product of its (nonzero) digits is 21600, while the sum is 37.

The spelling of 65631118051 in words is "sixty-five billion, six hundred thirty-one million, one hundred eighteen thousand, fifty-one".