15609979889793 has 24 divisors (see below), whose sum is σ = 22755075743400. Its totient is φ = 10310967788544.

The previous prime is 15609979889789. The next prime is 15609979889827. The reversal of 15609979889793 is 39798897990651.

It can be written as a sum of positive squares in 4 ways, for example, as 9436981249089 + 6172998640704 = 3071967^2 + 2484552^2 .

It is not a de Polignac number, because 15609979889793 - 2² = 15609979889789 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15609979889783) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58350823 + ... + 58617731.

It is an arithmetic number, because the mean of its divisors is an integer number (948128155975).

Almost surely, 2^{15609979889793} is an apocalyptic number.

It is an amenable number.

15609979889793 is a deficient number, since it is larger than the sum of its proper divisors (7145095853607).

15609979889793 is a wasteful number, since it uses less digits than its factorization.

15609979889793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326641 (or 326638 counting only the distinct ones).

The product of its (nonzero) digits is 16665989760, while the sum is 90.

The spelling of 15609979889793 in words is "fifteen trillion, six hundred nine billion, nine hundred seventy-nine million, eight hundred eighty-nine thousand, seven hundred ninety-three".