2165772136 has 16 divisors (see below), whose sum is σ = 4429988640. Its totient is φ = 984441840.

The previous prime is 2165772131. The next prime is 2165772149. The reversal of 2165772136 is 6312775612.

It is not an unprimeable number, because it can be changed into a prime (2165772131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12305436 + ... + 12305611.

It is an arithmetic number, because the mean of its divisors is an integer number (276874290).

Almost surely, 2^2165772136 is an apocalyptic number.

It is an amenable number.

2165772136 is an abundant number, since it is smaller than the sum of its proper divisors (2264216504).

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

2165772136 is a wasteful number, since it uses less digits than its factorization.

2165772136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24611064 (or 24611060 counting only the distinct ones).

The product of its digits is 105840, while the sum is 40.

The square root of 2165772136 is about 46537.8570198500. The cubic root of 2165772136 is about 1293.8112426500.

The spelling of 2165772136 in words is "two billion, one hundred sixty-five million, seven hundred seventy-two thousand, one hundred thirty-six".