2641563569 has 2 divisors, whose sum is σ = 2641563570. Its totient is φ = 2641563568.

The previous prime is 2641563553. The next prime is 2641563583. The reversal of 2641563569 is 9653651462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2369742400 + 271821169 = 48680^2 + 16487^2 .

It is a cyclic number.

It is not a de Polignac number, because 2641563569 - 2⁴ = 2641563553 is a prime.

It is a super-2 number, since 2×2641563569² = 13955716178136035522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2641560569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1320781784 + 1320781785.

It is an arithmetic number, because the mean of its divisors is an integer number (1320781785).

Almost surely, 2^2641563569 is an apocalyptic number.

It is an amenable number.

2641563569 is a deficient number, since it is larger than the sum of its proper divisors (1).

2641563569 is an equidigital number, since it uses as much as digits as its factorization.

2641563569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1166400, while the sum is 47.

The square root of 2641563569 is about 51396.1435226419. The cubic root of 2641563569 is about 1382.3574437580.

The spelling of 2641563569 in words is "two billion, six hundred forty-one million, five hundred sixty-three thousand, five hundred sixty-nine".