15922716993 has 10 divisors (see below), whose sum is σ = 23785787234. Its totient is φ = 10615144608.

The previous prime is 15922716977. The next prime is 15922717001. The reversal of 15922716993 is 39961722951.

It can be written as a sum of positive squares in only one way, i.e., 15656766129 + 265950864 = 125127^2 + 16308^2 .

It is not a de Polignac number, because 15922716993 - 2⁴ = 15922716977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15922716193) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 98288296 + ... + 98288457.

Almost surely, 2^15922716993 is an apocalyptic number.

It is an amenable number.

15922716993 is a deficient number, since it is larger than the sum of its proper divisors (7863070241).

15922716993 is an equidigital number, since it uses as much as digits as its factorization.

15922716993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196576765 (or 196576756 counting only the distinct ones).

The product of its digits is 1837080, while the sum is 54.

The spelling of 15922716993 in words is "fifteen billion, nine hundred twenty-two million, seven hundred sixteen thousand, nine hundred ninety-three".