2161688366617 has 32 divisors (see below), whose sum is σ = 2346835196160. Its totient is φ = 1979324605440.

The previous prime is 2161688366609. The next prime is 2161688366653. The reversal of 2161688366617 is 7166638861612.

It is not a de Polignac number, because 2161688366617 - 2³ = 2161688366609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2161688364617) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 857471317 + ... + 857473837.

It is an arithmetic number, because the mean of its divisors is an integer number (73338599880).

Almost surely, 2^{2161688366617} is an apocalyptic number.

It is an amenable number.

2161688366617 is a deficient number, since it is larger than the sum of its proper divisors (185146829543).

2161688366617 is a wasteful number, since it uses less digits than its factorization.

2161688366617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3793.

The product of its digits is 20901888, while the sum is 61.

The spelling of 2161688366617 in words is "two trillion, one hundred sixty-one billion, six hundred eighty-eight million, three hundred sixty-six thousand, six hundred seventeen".