11637641684 has 12 divisors (see below), whose sum is σ = 20454808500. Its totient is φ = 5793410688.

The previous prime is 11637641663. The next prime is 11637641693. The reversal of 11637641684 is 48614673611.

It can be written as a sum of positive squares in 2 ways, for example, as 7357865284 + 4279776400 = 85778^2 + 65420^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6351509 + ... + 6353340.

It is an arithmetic number, because the mean of its divisors is an integer number (1704567375).

Almost surely, 2^11637641684 is an apocalyptic number.

It is an amenable number.

11637641684 is a deficient number, since it is larger than the sum of its proper divisors (8817166816).

11637641684 is a wasteful number, since it uses less digits than its factorization.

11637641684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12705082 (or 12705080 counting only the distinct ones).

The product of its digits is 580608, while the sum is 47.

The spelling of 11637641684 in words is "eleven billion, six hundred thirty-seven million, six hundred forty-one thousand, six hundred eighty-four".