15661164 has 12 divisors (see below), whose sum is σ = 36542744. Its totient is φ = 5220384.

The previous prime is 15661153. The next prime is 15661193. The reversal of 15661164 is 46116651.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

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, 652537 + ... + 652560.

Almost surely, 2^15661164 is an apocalyptic number.

It is an amenable number.

15661164 is an abundant number, since it is smaller than the sum of its proper divisors (20881580).

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

15661164 is a wasteful number, since it uses less digits than its factorization.

15661164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1305104 (or 1305102 counting only the distinct ones).

The product of its digits is 4320, while the sum is 30.

The square root of 15661164 is about 3957.4188557695. The cubic root of 15661164 is about 250.1927260552.

The spelling of 15661164 in words is "fifteen million, six hundred sixty-one thousand, one hundred sixty-four".