11637641685 has 16 divisors (see below), whose sum is σ = 18971553024. Its totient is φ = 6089633472.

The previous prime is 11637641663. The next prime is 11637641693. The reversal of 11637641685 is 58614673611.

11637641685 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11637641685 - 2⁶ = 11637641621 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7318477 + ... + 7320066.

It is an arithmetic number, because the mean of its divisors is an integer number (1185722064).

Almost surely, 2^11637641685 is an apocalyptic number.

11637641685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11637641685 is a deficient number, since it is larger than the sum of its proper divisors (7333911339).

11637641685 is a wasteful number, since it uses less digits than its factorization.

11637641685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14638604.

The product of its digits is 725760, while the sum is 48.

The spelling of 11637641685 in words is "eleven billion, six hundred thirty-seven million, six hundred forty-one thousand, six hundred eighty-five".