13651664 has 20 divisors (see below), whose sum is σ = 28485156. Its totient is φ = 6300672.

The previous prime is 13651661. The next prime is 13651669. The reversal of 13651664 is 46615631.

It can be written as a sum of positive squares in 2 ways, for example, as 5856400 + 7795264 = 2420^2 + 2792^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13651664.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13651661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32609 + ... + 33024.

Almost surely, 2^13651664 is an apocalyptic number.

It is an amenable number.

13651664 is an abundant number, since it is smaller than the sum of its proper divisors (14833492).

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

13651664 is a wasteful number, since it uses less digits than its factorization.

13651664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65654 (or 65648 counting only the distinct ones).

The product of its digits is 12960, while the sum is 32.

The square root of 13651664 is about 3694.8158276158. The cubic root of 13651664 is about 238.9985119215.

The spelling of 13651664 in words is "thirteen million, six hundred fifty-one thousand, six hundred sixty-four".