11636512172 has 18 divisors (see below), whose sum is σ = 21632238012. Its totient is φ = 5476005184.

The previous prime is 11636512169. The next prime is 11636512177. The reversal of 11636512172 is 27121563611.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (11636512177) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5031938 + ... + 5034249.

Almost surely, 2^11636512172 is an apocalyptic number.

It is an amenable number.

11636512172 is a deficient number, since it is larger than the sum of its proper divisors (9995725840).

11636512172 is a wasteful number, since it uses less digits than its factorization.

11636512172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10066225 (or 10066206 counting only the distinct ones).

The product of its digits is 15120, while the sum is 35.

The spelling of 11636512172 in words is "eleven billion, six hundred thirty-six million, five hundred twelve thousand, one hundred seventy-two".