2161134660 has 48 divisors (see below), whose sum is σ = 6055148736. Its totient is φ = 575924352.

The previous prime is 2161134617. The next prime is 2161134691. The reversal of 2161134660 is 664311612.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87219 + ... + 109221.

It is an arithmetic number, because the mean of its divisors is an integer number (126148932).

Almost surely, 2^2161134660 is an apocalyptic number.

2161134660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2161134660 is an abundant number, since it is smaller than the sum of its proper divisors (3894014076).

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

2161134660 is a wasteful number, since it uses less digits than its factorization.

2161134660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23652 (or 23650 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 2161134660 is about 46488.0055498190. The cubic root of 2161134660 is about 1292.8871216992.

The spelling of 2161134660 in words is "two billion, one hundred sixty-one million, one hundred thirty-four thousand, six hundred sixty".