2156365116 has 18 divisors (see below), whose sum is σ = 5450811912. Its totient is φ = 718788360.

The previous prime is 2156365109. The next prime is 2156365129. The reversal of 2156365116 is 6115636512.

2156365116 is a `hidden beast` number, since 2 + 1 + 5 + 636 + 5 + 1 + 16 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 59899031 = 2156365116 / (2 + 1 + 5 + 6 + 3 + 6 + 5 + 1 + 1 + 6).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29949480 + ... + 29949551.

It is an arithmetic number, because the mean of its divisors is an integer number (302822884).

Almost surely, 2^2156365116 is an apocalyptic number.

It is an amenable number.

2156365116 is an abundant number, since it is smaller than the sum of its proper divisors (3294446796).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2156365116 is a wasteful number, since it uses less digits than its factorization.

2156365116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59899041 (or 59899036 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 2156365116 is about 46436.6785633943. The cubic root of 2156365116 is about 1291.9353031788.

The spelling of 2156365116 in words is "two billion, one hundred fifty-six million, three hundred sixty-five thousand, one hundred sixteen".