2116911765 has 16 divisors (see below), whose sum is σ = 3404256768. Its totient is φ = 1123286976.

The previous prime is 2116911761. The next prime is 2116911773. The reversal of 2116911765 is 5671196112.

It is not a de Polignac number, because 2116911765 - 2² = 2116911761 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2116911761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 355237 + ... + 361146.

It is an arithmetic number, because the mean of its divisors is an integer number (212766048).

Almost surely, 2^2116911765 is an apocalyptic number.

It is an amenable number.

2116911765 is a deficient number, since it is larger than the sum of its proper divisors (1287345003).

2116911765 is a wasteful number, since it uses less digits than its factorization.

2116911765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716588.

The product of its digits is 22680, while the sum is 39.

The square root of 2116911765 is about 46009.9094217757. The cubic root of 2116911765 is about 1284.0075740035.

The spelling of 2116911765 in words is "two billion, one hundred sixteen million, nine hundred eleven thousand, seven hundred sixty-five".