2643947544484 has 27 divisors (see below), whose sum is σ = 4661231715777. Its totient is φ = 1312238778528.

The previous prime is 2643947544443. The next prime is 2643947544487. The reversal of 2643947544484 is 4844457493462.

The square root of 2643947544484 is 1626022.

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

It can be written as a sum of positive squares in only one way, i.e., 892877586084 + 1751069958400 = 944922^2 + 1323280^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2643947544487) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 452031192 + ... + 452037040.

Almost surely, 2^{2643947544484} is an apocalyptic number.

2643947544484 is the 1626022-nd square number.

It is an amenable number.

2643947544484 is a deficient number, since it is larger than the sum of its proper divisors (2017284171293).

2643947544484 is an frugal number, since it uses more digits than its factorization.

2643947544484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11980 (or 5990 counting only the distinct ones).

The product of its digits is 371589120, while the sum is 64.

Multiplying 2643947544484 by its sum of digits (64), we get a square (169212642846976 = 13008176²).

The spelling of 2643947544484 in words is "two trillion, six hundred forty-three billion, nine hundred forty-seven million, five hundred forty-four thousand, four hundred eighty-four".