15117748664 has 8 divisors (see below), whose sum is σ = 28345778760. Its totient is φ = 7558874328.

The previous prime is 15117748651. The next prime is 15117748717. The reversal of 15117748664 is 46684771151.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 944859284 + ... + 944859299.

It is an arithmetic number, because the mean of its divisors is an integer number (3543222345).

Almost surely, 2^15117748664 is an apocalyptic number.

It is an amenable number.

15117748664 is a deficient number, since it is larger than the sum of its proper divisors (13228030096).

15117748664 is a wasteful number, since it uses less digits than its factorization.

15117748664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1889718589 (or 1889718585 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 50.

The spelling of 15117748664 in words is "fifteen billion, one hundred seventeen million, seven hundred forty-eight thousand, six hundred sixty-four".