5118409665 has 24 divisors (see below), whose sum is σ = 9177840360. Its totient is φ = 2635686144.

The previous prime is 5118409663. The next prime is 5118409679. The reversal of 5118409665 is 5669048115.

5118409665 is a `hidden beast` number, since 511 + 8 + 40 + 96 + 6 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1377374769 + 3741034896 = 37113^2 + 61164^2 .

It is not a de Polignac number, because 5118409665 - 2¹ = 5118409663 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 5118409665.

It is not an unprimeable number, because it can be changed into a prime (5118409663) 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, 1959772 + ... + 1962381.

It is an arithmetic number, because the mean of its divisors is an integer number (382410015).

Almost surely, 2^5118409665 is an apocalyptic number.

It is an amenable number.

5118409665 is a deficient number, since it is larger than the sum of its proper divisors (4059430695).

5118409665 is a wasteful number, since it uses less digits than its factorization.

5118409665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3922193 (or 3922190 counting only the distinct ones).

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

The square root of 5118409665 is about 71543.0616132690. The cubic root of 5118409665 is about 1723.3692818327.

The spelling of 5118409665 in words is "five billion, one hundred eighteen million, four hundred nine thousand, six hundred sixty-five".