15928608664 has 8 divisors (see below), whose sum is σ = 29866141260. Its totient is φ = 7964304328.

The previous prime is 15928608629. The next prime is 15928608667. The reversal of 15928608664 is 46680682951.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15928608667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 995538034 + ... + 995538049.

Almost surely, 2^15928608664 is an apocalyptic number.

It is an amenable number.

15928608664 is a deficient number, since it is larger than the sum of its proper divisors (13937532596).

15928608664 is a wasteful number, since it uses less digits than its factorization.

15928608664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1991076089 (or 1991076085 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 55.

The spelling of 15928608664 in words is "fifteen billion, nine hundred twenty-eight million, six hundred eight thousand, six hundred sixty-four".