2161659236 has 24 divisors (see below), whose sum is σ = 4227461280. Its totient is φ = 958606400.

The previous prime is 2161659193. The next prime is 2161659239. The reversal of 2161659236 is 6329561612.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a junction number, because it is equal to n+sod(n) for n = 2161659193 and 2161659202.

It is not an unprimeable number, because it can be changed into a prime (2161659239) 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, 597326 + ... + 600933.

It is an arithmetic number, because the mean of its divisors is an integer number (176144220).

Almost surely, 2^2161659236 is an apocalyptic number.

It is an amenable number.

2161659236 is a deficient number, since it is larger than the sum of its proper divisors (2065802044).

2161659236 is a wasteful number, since it uses less digits than its factorization.

2161659236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1198315 (or 1198313 counting only the distinct ones).

The product of its digits is 116640, while the sum is 41.

The square root of 2161659236 is about 46493.6472649759. The cubic root of 2161659236 is about 1292.9917214880.

The spelling of 2161659236 in words is "two billion, one hundred sixty-one million, six hundred fifty-nine thousand, two hundred thirty-six".