2645690563 has 2 divisors, whose sum is σ = 2645690564. Its totient is φ = 2645690562.

The previous prime is 2645690527. The next prime is 2645690591. The reversal of 2645690563 is 3650965462.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2645690563 is a prime.

It is not a weakly prime, because it can be changed into another prime (2645690363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1322845281 + 1322845282.

It is an arithmetic number, because the mean of its divisors is an integer number (1322845282).

Almost surely, 2^2645690563 is an apocalyptic number.

2645690563 is a deficient number, since it is larger than the sum of its proper divisors (1).

2645690563 is an equidigital number, since it uses as much as digits as its factorization.

2645690563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1166400, while the sum is 46.

The square root of 2645690563 is about 51436.2767217846. The cubic root of 2645690563 is about 1383.0769686761.

The spelling of 2645690563 in words is "two billion, six hundred forty-five million, six hundred ninety thousand, five hundred sixty-three".