11816586639 has 96 divisors (see below), whose sum is σ = 21123763200. Its totient is φ = 6468733440.

The previous prime is 11816586601. The next prime is 11816586641. The reversal of 11816586639 is 93668561811.

11816586639 is a `hidden beast` number, since 1 + 18 + 16 + 586 + 6 + 39 = 666.

It is not a de Polignac number, because 11816586639 - 2²⁵ = 11783032207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11816586689) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2356567 + ... + 2361575.

It is an arithmetic number, because the mean of its divisors is an integer number (220039200).

Almost surely, 2^11816586639 is an apocalyptic number.

11816586639 is a deficient number, since it is larger than the sum of its proper divisors (9307176561).

11816586639 is a wasteful number, since it uses less digits than its factorization.

11816586639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5102 (or 5083 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 54.

The spelling of 11816586639 in words is "eleven billion, eight hundred sixteen million, five hundred eighty-six thousand, six hundred thirty-nine".