2164477880 has 64 divisors (see below), whose sum is σ = 4953968640. Its totient is φ = 850937472.

The previous prime is 2164477873. The next prime is 2164477907. The reversal of 2164477880 is 887744612.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1990697 + ... + 1991783.

It is an arithmetic number, because the mean of its divisors is an integer number (77405760).

Almost surely, 2^2164477880 is an apocalyptic number.

2164477880 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 2164477880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2476984320).

2164477880 is an abundant number, since it is smaller than the sum of its proper divisors (2789490760).

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

2164477880 is a wasteful number, since it uses less digits than its factorization.

2164477880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1908 (or 1904 counting only the distinct ones).

The product of its (nonzero) digits is 602112, while the sum is 47.

The square root of 2164477880 is about 46523.9495313973. The cubic root of 2164477880 is about 1293.5534659724.

The spelling of 2164477880 in words is "two billion, one hundred sixty-four million, four hundred seventy-seven thousand, eight hundred eighty".