2643043656 has 48 divisors (see below), whose sum is σ = 7262917200. Its totient is φ = 800921440.

The previous prime is 2643043589. The next prime is 2643043693. The reversal of 2643043656 is 6563403462.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 452166 + ... + 457973.

It is an arithmetic number, because the mean of its divisors is an integer number (151310775).

Almost surely, 2^2643043656 is an apocalyptic number.

It is an amenable number.

2643043656 is an abundant number, since it is smaller than the sum of its proper divisors (4619873544).

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

2643043656 is a wasteful number, since it uses less digits than its factorization.

2643043656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910170 (or 910155 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 39.

The square root of 2643043656 is about 51410.5403200550. The cubic root of 2643043656 is about 1382.6155771471.

The spelling of 2643043656 in words is "two billion, six hundred forty-three million, forty-three thousand, six hundred fifty-six".