2172507680 has 96 divisors (see below), whose sum is σ = 5962118400. Its totient is φ = 732625920.

The previous prime is 2172507661. The next prime is 2172507691. The reversal of 2172507680 is 867052712.

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, 52421 + ... + 84219.

It is an arithmetic number, because the mean of its divisors is an integer number (62105400).

Almost surely, 2^2172507680 is an apocalyptic number.

2172507680 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 2172507680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2981059200).

2172507680 is an abundant number, since it is smaller than the sum of its proper divisors (3789610720).

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

2172507680 is a wasteful number, since it uses less digits than its factorization.

2172507680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31882 (or 31874 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 2172507680 is about 46610.1671312172. The cubic root of 2172507680 is about 1295.1511041462.

The spelling of 2172507680 in words is "two billion, one hundred seventy-two million, five hundred seven thousand, six hundred eighty".