165917446593979 has 4 divisors (see below), whose sum is σ = 166300627764376. Its totient is φ = 165534265423584.

The previous prime is 165917446593967. The next prime is 165917446594093. The reversal of 165917446593979 is 979395644719561.

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 165917446593979 - 2⁵ = 165917446593947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165917446593896 and 165917446593905.

It is not an unprimeable number, because it can be changed into a prime (165917446593959) 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, 191590584549 + ... + 191590585414.

It is an arithmetic number, because the mean of its divisors is an integer number (41575156941094).

Almost surely, 2^{165917446593979} is an apocalyptic number.

165917446593979 is a deficient number, since it is larger than the sum of its proper divisors (383181170397).

165917446593979 is an equidigital number, since it uses as much as digits as its factorization.

165917446593979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383181170396.

The product of its digits is 13888324800, while the sum is 85.

The spelling of 165917446593979 in words is "one hundred sixty-five trillion, nine hundred seventeen billion, four hundred forty-six million, five hundred ninety-three thousand, nine hundred seventy-nine".