15715664 has 20 divisors (see below), whose sum is σ = 30590304. Its totient is φ = 7821408.

The previous prime is 15715657. The next prime is 15715673. The reversal of 15715664 is 46651751.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1469 + ... + 5795.

Almost surely, 2^15715664 is an apocalyptic number.

It is an amenable number.

15715664 is a deficient number, since it is larger than the sum of its proper divisors (14874640).

15715664 is a wasteful number, since it uses less digits than its factorization.

15715664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4562 (or 4556 counting only the distinct ones).

The product of its digits is 25200, while the sum is 35.

The square root of 15715664 is about 3964.2986769415. The cubic root of 15715664 is about 250.4826090877.

The spelling of 15715664 in words is "fifteen million, seven hundred fifteen thousand, six hundred sixty-four".