2164928680 has 16 divisors (see below), whose sum is σ = 4871089620. Its totient is φ = 865971456.

The previous prime is 2164928669. The next prime is 2164928687. The reversal of 2164928680 is 868294612.

It can be written as a sum of positive squares in 2 ways, for example, as 1757454084 + 407474596 = 41922^2 + 20186^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2164928680.

It is not an unprimeable number, because it can be changed into a prime (2164928687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27061569 + ... + 27061648.

Almost surely, 2^2164928680 is an apocalyptic number.

2164928680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2164928680 is an abundant number, since it is smaller than the sum of its proper divisors (2706160940).

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

2164928680 is a wasteful number, since it uses less digits than its factorization.

2164928680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54123228 (or 54123224 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 46.

The square root of 2164928680 is about 46528.7940956995. The cubic root of 2164928680 is about 1293.6432633671.

The spelling of 2164928680 in words is "two billion, one hundred sixty-four million, nine hundred twenty-eight thousand, six hundred eighty".