7928657872215 has 32 divisors (see below), whose sum is σ = 12994209146880. Its totient is φ = 4126365970944.

The previous prime is 7928657872207. The next prime is 7928657872229. The reversal of 7928657872215 is 5122787568297.

It is not a de Polignac number, because 7928657872215 - 2³ = 7928657872207 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7928657872215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16448355 + ... + 16923524.

It is an arithmetic number, because the mean of its divisors is an integer number (406069035840).

Almost surely, 2^{7928657872215} is an apocalyptic number.

7928657872215 is a deficient number, since it is larger than the sum of its proper divisors (5065551274665).

7928657872215 is a wasteful number, since it uses less digits than its factorization.

7928657872215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33372271.

The product of its digits is 237081600, while the sum is 69.

The spelling of 7928657872215 in words is "seven trillion, nine hundred twenty-eight billion, six hundred fifty-seven million, eight hundred seventy-two thousand, two hundred fifteen".