11615665112217 has 8 divisors (see below), whose sum is σ = 17208392758880. Its totient is φ = 7743776741460.

The previous prime is 11615665112179. The next prime is 11615665112237. The reversal of 11615665112217 is 71221156651611.

11615665112217 is a `hidden beast` number, since 1 + 1 + 6 + 1 + 566 + 51 + 1 + 22 + 17 = 666.

11615665112217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11615665112217 - 2⁸ = 11615665111961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11615665112237) 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, 215104909459 + ... + 215104909512.

It is an arithmetic number, because the mean of its divisors is an integer number (2151049094860).

Almost surely, 2^{11615665112217} is an apocalyptic number.

It is an amenable number.

11615665112217 is a deficient number, since it is larger than the sum of its proper divisors (5592727646663).

11615665112217 is an equidigital number, since it uses as much as digits as its factorization.

11615665112217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430209818980 (or 430209818974 counting only the distinct ones).

The product of its digits is 151200, while the sum is 45.

The spelling of 11615665112217 in words is "eleven trillion, six hundred fifteen billion, six hundred sixty-five million, one hundred twelve thousand, two hundred seventeen".