8636661964 has 24 divisors (see below), whose sum is σ = 18182447360. Its totient is φ = 3506614416.

The previous prime is 8636661953. The next prime is 8636661977. The reversal of 8636661964 is 4691666368.

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, 8116632 + ... + 8117695.

Almost surely, 2^8636661964 is an apocalyptic number.

It is an amenable number.

8636661964 is an abundant number, since it is smaller than the sum of its proper divisors (9545785396).

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

8636661964 is a wasteful number, since it uses less digits than its factorization.

8636661964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16234357 (or 16234355 counting only the distinct ones).

The product of its digits is 6718464, while the sum is 55.

The square root of 8636661964 is about 92933.6427995804. The cubic root of 8636661964 is about 2051.7068445069.

The spelling of 8636661964 in words is "eight billion, six hundred thirty-six million, six hundred sixty-one thousand, nine hundred sixty-four".