2546643563 has 2 divisors, whose sum is σ = 2546643564. Its totient is φ = 2546643562.

The previous prime is 2546643553. The next prime is 2546643581. The reversal of 2546643563 is 3653466452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2546643563 - 2²⁶ = 2479534699 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2546643553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1273321781 + 1273321782.

It is an arithmetic number, because the mean of its divisors is an integer number (1273321782).

Almost surely, 2^2546643563 is an apocalyptic number.

2546643563 is a deficient number, since it is larger than the sum of its proper divisors (1).

2546643563 is an equidigital number, since it uses as much as digits as its factorization.

2546643563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1555200, while the sum is 44.

The square root of 2546643563 is about 50464.2800701645. The cubic root of 2546643563 is about 1365.5975259240.

The spelling of 2546643563 in words is "two billion, five hundred forty-six million, six hundred forty-three thousand, five hundred sixty-three".