13631664 has 40 divisors (see below), whose sum is σ = 37071040. Its totient is φ = 4304448.

The previous prime is 13631659. The next prime is 13631677. The reversal of 13631664 is 46613631.

It is a nude number because it is divisible by every one of its digits.

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, 6562 + ... + 8385.

It is an arithmetic number, because the mean of its divisors is an integer number (926776).

Almost surely, 2^13631664 is an apocalyptic number.

It is an amenable number.

13631664 is an abundant number, since it is smaller than the sum of its proper divisors (23439376).

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

13631664 is a wasteful number, since it uses less digits than its factorization.

13631664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14977 (or 14971 counting only the distinct ones).

The product of its digits is 7776, while the sum is 30.

The square root of 13631664 is about 3692.1083407722. The cubic root of 13631664 is about 238.8817421174.

The spelling of 13631664 in words is "thirteen million, six hundred thirty-one thousand, six hundred sixty-four".