2116161365 has 8 divisors (see below), whose sum is σ = 2598449568. Its totient is φ = 1653558480.

The previous prime is 2116161361. The next prime is 2116161367. The reversal of 2116161365 is 5631616112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2116161365 - 2² = 2116161361 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2116161361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4921091 + ... + 4921520.

It is an arithmetic number, because the mean of its divisors is an integer number (324806196).

Almost surely, 2^2116161365 is an apocalyptic number.

It is an amenable number.

2116161365 is a deficient number, since it is larger than the sum of its proper divisors (482288203).

2116161365 is an equidigital number, since it uses as much as digits as its factorization.

2116161365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9842659.

The product of its digits is 6480, while the sum is 32.

The square root of 2116161365 is about 46001.7539339534. The cubic root of 2116161365 is about 1283.8558383209.

Adding to 2116161365 its reverse (5631616112), we get a palindrome (7747777477).

The spelling of 2116161365 in words is "two billion, one hundred sixteen million, one hundred sixty-one thousand, three hundred sixty-five".