2643605056 has 21 divisors (see below), whose sum is σ = 5246720139. Its totient is φ = 1321596864.

The previous prime is 2643604913. The next prime is 2643605059. The reversal of 2643605056 is 6505063462.

The square root of 2643605056 is 51416.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2643605059) 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 2 ways as a sum of consecutive naturals, for example, 408115 + ... + 414541.

Almost surely, 2^2643605056 is an apocalyptic number.

2643605056 is the 51416-th square number.

It is an amenable number.

2643605056 is a deficient number, since it is larger than the sum of its proper divisors (2603115083).

2643605056 is an frugal number, since it uses more digits than its factorization.

2643605056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12866 (or 6429 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 37.

The cubic root of 2643605056 is about 1382.7134624561.

Multiplying 2643605056 by its product of nonzero digits (129600), we get a square (342611215257600 = 18509760²).

The spelling of 2643605056 in words is "two billion, six hundred forty-three million, six hundred five thousand, fifty-six".