2161393436617 has 4 divisors (see below), whose sum is σ = 2255367064320. Its totient is φ = 2067419808916.

The previous prime is 2161393436597. The next prime is 2161393436639. The reversal of 2161393436617 is 7166343931612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2161393436617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2161393436687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46986813817 + ... + 46986813862.

It is an arithmetic number, because the mean of its divisors is an integer number (563841766080).

Almost surely, 2^{2161393436617} is an apocalyptic number.

It is an amenable number.

2161393436617 is a deficient number, since it is larger than the sum of its proper divisors (93973627703).

2161393436617 is an equidigital number, since it uses as much as digits as its factorization.

2161393436617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93973627702.

The product of its digits is 2939328, while the sum is 52.

The spelling of 2161393436617 in words is "two trillion, one hundred sixty-one billion, three hundred ninety-three million, four hundred thirty-six thousand, six hundred seventeen".