2165071616993 has 4 divisors (see below), whose sum is σ = 2234912636928. Its totient is φ = 2095230597060.

The previous prime is 2165071616989. The next prime is 2165071617019. The reversal of 2165071616993 is 3996161705612.

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 not a de Polignac number, because 2165071616993 - 2² = 2165071616989 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2165071016993) 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, 34920509921 + ... + 34920509982.

It is an arithmetic number, because the mean of its divisors is an integer number (558728159232).

Almost surely, 2^{2165071616993} is an apocalyptic number.

It is an amenable number.

2165071616993 is a deficient number, since it is larger than the sum of its proper divisors (69841019935).

2165071616993 is an equidigital number, since it uses as much as digits as its factorization.

2165071616993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69841019934.

The product of its (nonzero) digits is 3674160, while the sum is 56.

The spelling of 2165071616993 in words is "two trillion, one hundred sixty-five billion, seventy-one million, six hundred sixteen thousand, nine hundred ninety-three".