2080645688 has 32 divisors (see below), whose sum is σ = 4440908160. Its totient is φ = 904627680.

The previous prime is 2080645639. The next prime is 2080645717. The reversal of 2080645688 is 8865460802.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 511970 + ... + 516017.

It is an arithmetic number, because the mean of its divisors is an integer number (138778380).

Almost surely, 2^2080645688 is an apocalyptic number.

It is an amenable number.

2080645688 is an abundant number, since it is smaller than the sum of its proper divisors (2360262472).

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

2080645688 is a wasteful number, since it uses less digits than its factorization.

2080645688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1028027 (or 1028023 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 47.

The square root of 2080645688 is about 45614.0952776661. The cubic root of 2080645688 is about 1276.6329328513.

The spelling of 2080645688 in words is "two billion, eighty million, six hundred forty-five thousand, six hundred eighty-eight".