15941664 has 48 divisors (see below), whose sum is σ = 46499040. Its totient is φ = 5313600.

The previous prime is 15941633. The next prime is 15941669. The reversal of 15941664 is 46614951.

15941664 is a `hidden beast` number, since 1 + 594 + 1 + 6 + 64 = 666.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (15941669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8362 + ... + 10089.

It is an arithmetic number, because the mean of its divisors is an integer number (968730).

Almost surely, 2^15941664 is an apocalyptic number.

It is an amenable number.

15941664 is an abundant number, since it is smaller than the sum of its proper divisors (30557376).

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

15941664 is a wasteful number, since it uses less digits than its factorization.

15941664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18470 (or 18456 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 15941664 is about 3992.7013411975. The cubic root of 15941664 is about 251.6775922239.

The spelling of 15941664 in words is "fifteen million, nine hundred forty-one thousand, six hundred sixty-four".