15785872872215 has 16 divisors (see below), whose sum is σ = 18959413583808. Its totient is φ = 12617789995776.

The previous prime is 15785872872169. The next prime is 15785872872353. The reversal of 15785872872215 is 51227827858751.

It is a cyclic number.

It is not a de Polignac number, because 15785872872215 - 2²⁰ = 15785871823639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52842809 + ... + 53140701.

It is an arithmetic number, because the mean of its divisors is an integer number (1184963348988).

Almost surely, 2^{15785872872215} is an apocalyptic number.

15785872872215 is a deficient number, since it is larger than the sum of its proper divisors (3173540711593).

15785872872215 is a wasteful number, since it uses less digits than its factorization.

15785872872215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307018.

The product of its digits is 175616000, while the sum is 68.

The spelling of 15785872872215 in words is "fifteen trillion, seven hundred eighty-five billion, eight hundred seventy-two million, eight hundred seventy-two thousand, two hundred fifteen".