2645868764 has 36 divisors (see below), whose sum is σ = 5816545392. Its totient is φ = 1030856640.

The previous prime is 2645868761. The next prime is 2645868767. The reversal of 2645868764 is 4678685462.

2645868764 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2645868761) and next prime (2645868767).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2645868761) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 387089 + ... + 393864.

Almost surely, 2^2645868764 is an apocalyptic number.

It is an amenable number.

2645868764 is an abundant number, since it is smaller than the sum of its proper divisors (3170676628).

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

2645868764 is a wasteful number, since it uses less digits than its factorization.

2645868764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780986 (or 780973 counting only the distinct ones).

The product of its digits is 15482880, while the sum is 56.

The square root of 2645868764 is about 51438.0089428042. The cubic root of 2645868764 is about 1383.1080204512.

The spelling of 2645868764 in words is "two billion, six hundred forty-five million, eight hundred sixty-eight thousand, seven hundred sixty-four".