2161024660 has 96 divisors (see below), whose sum is σ = 4860172800. Its totient is φ = 804816000.

The previous prime is 2161024631. The next prime is 2161024661. The reversal of 2161024660 is 664201612.

It is a super-2 number, since 2×2161024660² = 9340055162256231200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161024661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8609535 + ... + 8609785.

It is an arithmetic number, because the mean of its divisors is an integer number (50626800).

Almost surely, 2^2161024660 is an apocalyptic number.

2161024660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2161024660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2430086400).

2161024660 is an abundant number, since it is smaller than the sum of its proper divisors (2699148140).

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

2161024660 is a wasteful number, since it uses less digits than its factorization.

2161024660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581 (or 579 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 2161024660 is about 46486.8224338898. The cubic root of 2161024660 is about 1292.8651856920.

The spelling of 2161024660 in words is "two billion, one hundred sixty-one million, twenty-four thousand, six hundred sixty".