2643252564 has 48 divisors (see below), whose sum is σ = 6509814080. Its totient is φ = 832446720.

The previous prime is 2643252559. The next prime is 2643252571. The reversal of 2643252564 is 4652523462.

2643252564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69504 + ... + 100584.

Almost surely, 2^2643252564 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2643252564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3254907040).

2643252564 is an abundant number, since it is smaller than the sum of its proper divisors (3866561516).

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

2643252564 is a wasteful number, since it uses less digits than its factorization.

2643252564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31480 (or 31478 counting only the distinct ones).

The product of its digits is 345600, while the sum is 39.

The square root of 2643252564 is about 51412.5720422544. The cubic root of 2643252564 is about 1382.6520038181.

The spelling of 2643252564 in words is "two billion, six hundred forty-three million, two hundred fifty-two thousand, five hundred sixty-four".