2645243680 has 24 divisors (see below), whose sum is σ = 6249388572. Its totient is φ = 1058097408.

The previous prime is 2645243633. The next prime is 2645243723. The reversal of 2645243680 is 863425462.

2645243680 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2644839184 + 404496 = 51428^2 + 636^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8266227 + ... + 8266546.

Almost surely, 2^2645243680 is an apocalyptic number.

2645243680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2645243680 is an abundant number, since it is smaller than the sum of its proper divisors (3604144892).

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

2645243680 is a wasteful number, since it uses less digits than its factorization.

2645243680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16532788 (or 16532780 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 40.

The square root of 2645243680 is about 51431.9324933450. The cubic root of 2645243680 is about 1382.9990925510. Note that the first 3 decimals are identical.

The spelling of 2645243680 in words is "two billion, six hundred forty-five million, two hundred forty-three thousand, six hundred eighty".