7122157216715 has 16 divisors (see below), whose sum is σ = 8616667595328. Its totient is φ = 5651196788736.

The previous prime is 7122157216711. The next prime is 7122157216717. The reversal of 7122157216715 is 5176127512217.

It is a cyclic number.

It is not a de Polignac number, because 7122157216715 - 2² = 7122157216711 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 7122157216715.

It is not an unprimeable number, because it can be changed into a prime (7122157216711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11594447 + ... + 12193256.

It is an arithmetic number, because the mean of its divisors is an integer number (538541724708).

Almost surely, 2^{7122157216715} is an apocalyptic number.

7122157216715 is a deficient number, since it is larger than the sum of its proper divisors (1494510378613).

7122157216715 is a wasteful number, since it uses less digits than its factorization.

7122157216715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23788198.

The product of its digits is 411600, while the sum is 47.

The spelling of 7122157216715 in words is "seven trillion, one hundred twenty-two billion, one hundred fifty-seven million, two hundred sixteen thousand, seven hundred fifteen".