11986178564 has 24 divisors (see below), whose sum is σ = 21560172480. Its totient is φ = 5826391776.

The previous prime is 11986178549. The next prime is 11986178573. The reversal of 11986178564 is 46587168911.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154169 + ... + 218495.

It is an arithmetic number, because the mean of its divisors is an integer number (898340520).

Almost surely, 2^11986178564 is an apocalyptic number.

It is an amenable number.

11986178564 is a deficient number, since it is larger than the sum of its proper divisors (9573993916).

11986178564 is a wasteful number, since it uses less digits than its factorization.

11986178564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65627 (or 65625 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 56.

The spelling of 11986178564 in words is "eleven billion, nine hundred eighty-six million, one hundred seventy-eight thousand, five hundred sixty-four".