2643456443 has 2 divisors, whose sum is σ = 2643456444. Its totient is φ = 2643456442.

The previous prime is 2643456419. The next prime is 2643456457. The reversal of 2643456443 is 3446543462.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2643456443 - 2¹² = 2643452347 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2643456443.

It is not a weakly prime, because it can be changed into another prime (2643456743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1321728221 + 1321728222.

It is an arithmetic number, because the mean of its divisors is an integer number (1321728222).

Almost surely, 2^2643456443 is an apocalyptic number.

2643456443 is a deficient number, since it is larger than the sum of its proper divisors (1).

2643456443 is an equidigital number, since it uses as much as digits as its factorization.

2643456443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 829440, while the sum is 41.

The square root of 2643456443 is about 51414.5547778059. The cubic root of 2643456443 is about 1382.6875517468.

The spelling of 2643456443 in words is "two billion, six hundred forty-three million, four hundred fifty-six thousand, four hundred forty-three".