2178763980 has 24 divisors (see below), whose sum is σ = 6100539312. Its totient is φ = 581003712.

The previous prime is 2178763949. The next prime is 2178764009. The reversal of 2178763980 is 893678712.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18156307 + ... + 18156426.

It is an arithmetic number, because the mean of its divisors is an integer number (254189138).

Almost surely, 2^2178763980 is an apocalyptic number.

2178763980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2178763980 is an abundant number, since it is smaller than the sum of its proper divisors (3921775332).

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

2178763980 is a wasteful number, since it uses less digits than its factorization.

2178763980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36312745 (or 36312743 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 51.

The square root of 2178763980 is about 46677.2319230693. The cubic root of 2178763980 is about 1296.3931539453.

The spelling of 2178763980 in words is "two billion, one hundred seventy-eight million, seven hundred sixty-three thousand, nine hundred eighty".