15664648 has 16 divisors (see below), whose sum is σ = 29538000. Its totient is φ = 7787856.

The previous prime is 15664637. The next prime is 15664651. The reversal of 15664648 is 84646651.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 15664648.

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, 4038 + ... + 6901.

It is an arithmetic number, because the mean of its divisors is an integer number (1846125).

Almost surely, 2^15664648 is an apocalyptic number.

It is an amenable number.

15664648 is a deficient number, since it is larger than the sum of its proper divisors (13873352).

15664648 is a wasteful number, since it uses less digits than its factorization.

15664648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11124 (or 11120 counting only the distinct ones).

The product of its digits is 138240, while the sum is 40.

The square root of 15664648 is about 3957.8590171960. The cubic root of 15664648 is about 250.2112773971.

The spelling of 15664648 in words is "fifteen million, six hundred sixty-four thousand, six hundred forty-eight".