15917124285109 has 8 divisors (see below), whose sum is σ = 15966958222880. Its totient is φ = 15867368154000.

The previous prime is 15917124285077. The next prime is 15917124285119. The reversal of 15917124285109 is 90158242171951.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15917124285109 - 2⁵ = 15917124285077 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15917124285109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15917124285119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19041867 + ... + 19860184.

It is an arithmetic number, because the mean of its divisors is an integer number (1995869777860).

Almost surely, 2^{15917124285109} is an apocalyptic number.

It is an amenable number.

15917124285109 is a deficient number, since it is larger than the sum of its proper divisors (49833937771).

15917124285109 is an equidigital number, since it uses as much as digits as its factorization.

15917124285109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38903331.

The product of its (nonzero) digits is 1814400, while the sum is 55.

The spelling of 15917124285109 in words is "fifteen trillion, nine hundred seventeen billion, one hundred twenty-four million, two hundred eighty-five thousand, one hundred nine".