2117711965385 has 16 divisors (see below), whose sum is σ = 2570758560000. Its totient is φ = 1674514190976.

The previous prime is 2117711965331. The next prime is 2117711965409. The reversal of 2117711965385 is 5835691177112.

It is a cyclic number.

It is not a de Polignac number, because 2117711965385 - 2⁶ = 2117711965321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2117711965385.

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, 325616 + ... + 2083614.

It is an arithmetic number, because the mean of its divisors is an integer number (160672410000).

Almost surely, 2^{2117711965385} is an apocalyptic number.

It is an amenable number.

2117711965385 is a deficient number, since it is larger than the sum of its proper divisors (453046594615).

2117711965385 is a wasteful number, since it uses less digits than its factorization.

2117711965385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1760800.

The product of its digits is 3175200, while the sum is 56.

The spelling of 2117711965385 in words is "two trillion, one hundred seventeen billion, seven hundred eleven million, nine hundred sixty-five thousand, three hundred eighty-five".