3115660156691 has 4 divisors (see below), whose sum is σ = 3153198230952. Its totient is φ = 3078122082432.

The previous prime is 3115660156649. The next prime is 3115660156717. The reversal of 3115660156691 is 1966510665113.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3115660156691 - 2²² = 3115655962387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3115660153691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18769037006 + ... + 18769037171.

It is an arithmetic number, because the mean of its divisors is an integer number (788299557738).

Almost surely, 2^{3115660156691} is an apocalyptic number.

3115660156691 is a deficient number, since it is larger than the sum of its proper divisors (37538074261).

3115660156691 is an equidigital number, since it uses as much as digits as its factorization.

3115660156691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37538074260.

The product of its (nonzero) digits is 874800, while the sum is 50.

The spelling of 3115660156691 in words is "three trillion, one hundred fifteen billion, six hundred sixty million, one hundred fifty-six thousand, six hundred ninety-one".