5191864065 has 24 divisors (see below), whose sum is σ = 9001819008. Its totient is φ = 2768197920.

The previous prime is 5191864049. The next prime is 5191864079. The reversal of 5191864065 is 5604681915.

5191864065 is a `hidden beast` number, since 519 + 18 + 64 + 0 + 65 = 666.

It is not a de Polignac number, because 5191864065 - 2⁴ = 5191864049 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 5191864065.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 163000 + ... + 192230.

It is an arithmetic number, because the mean of its divisors is an integer number (375075792).

Almost surely, 2^5191864065 is an apocalyptic number.

It is an amenable number.

5191864065 is a deficient number, since it is larger than the sum of its proper divisors (3809954943).

5191864065 is a wasteful number, since it uses less digits than its factorization.

5191864065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33189 (or 33186 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The square root of 5191864065 is about 72054.5908669253. The cubic root of 5191864065 is about 1731.5741922391.

The spelling of 5191864065 in words is "five billion, one hundred ninety-one million, eight hundred sixty-four thousand, sixty-five".