2640707980 has 12 divisors (see below), whose sum is σ = 5545486800. Its totient is φ = 1056283184.

The previous prime is 2640707977. The next prime is 2640707981. The reversal of 2640707980 is 897070462.

It is not an unprimeable number, because it can be changed into a prime (2640707981) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 66017680 + ... + 66017719.

It is an arithmetic number, because the mean of its divisors is an integer number (462123900).

Almost surely, 2^2640707980 is an apocalyptic number.

2640707980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2640707980 is an abundant number, since it is smaller than the sum of its proper divisors (2904778820).

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

2640707980 is a wasteful number, since it uses less digits than its factorization.

2640707980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132035408 (or 132035406 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 2640707980 is about 51387.8193738555. The cubic root of 2640707980 is about 1382.2081814609.

The spelling of 2640707980 in words is "two billion, six hundred forty million, seven hundred seven thousand, nine hundred eighty".