15928717797 has 14 divisors (see below), whose sum is σ = 23882152742. Its totient is φ = 10619144712.

The previous prime is 15928717789. The next prime is 15928717807. The reversal of 15928717797 is 79771782951.

It can be written as a sum of positive squares in only one way, i.e., 9463592961 + 6465124836 = 97281^2 + 80406^2 .

It is not a de Polignac number, because 15928717797 - 2³ = 15928717789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15928717097) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 10924318 + ... + 10925775.

It is an arithmetic number, because the mean of its divisors is an integer number (1705868053).

Almost surely, 2^15928717797 is an apocalyptic number.

It is an amenable number.

15928717797 is a deficient number, since it is larger than the sum of its proper divisors (7953434945).

15928717797 is an frugal number, since it uses more digits than its factorization.

15928717797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21850111 (or 21850096 counting only the distinct ones).

The product of its digits is 15558480, while the sum is 63.

The spelling of 15928717797 in words is "fifteen billion, nine hundred twenty-eight million, seven hundred seventeen thousand, seven hundred ninety-seven".