11638135660 has 48 divisors (see below), whose sum is σ = 24747960384. Its totient is φ = 4596830208.

The previous prime is 11638135633. The next prime is 11638135681. The reversal of 11638135660 is 6653183611.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 880017 + ... + 893143.

It is an arithmetic number, because the mean of its divisors is an integer number (515582508).

Almost surely, 2^11638135660 is an apocalyptic number.

11638135660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11638135660 is an abundant number, since it is smaller than the sum of its proper divisors (13109824724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11638135660 is a wasteful number, since it uses less digits than its factorization.

11638135660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13690 (or 13688 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 40.

The spelling of 11638135660 in words is "eleven billion, six hundred thirty-eight million, one hundred thirty-five thousand, six hundred sixty".