11563631243 has 2 divisors, whose sum is σ = 11563631244. Its totient is φ = 11563631242.

The previous prime is 11563631203. The next prime is 11563631257. The reversal of 11563631243 is 34213636511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11563631243 - 2¹⁸ = 11563369099 is a prime.

It is not a weakly prime, because it can be changed into another prime (11563631203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5781815621 + 5781815622.

It is an arithmetic number, because the mean of its divisors is an integer number (5781815622).

Almost surely, 2^11563631243 is an apocalyptic number.

11563631243 is a deficient number, since it is larger than the sum of its proper divisors (1).

11563631243 is an equidigital number, since it uses as much as digits as its factorization.

11563631243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 35.

The spelling of 11563631243 in words is "eleven billion, five hundred sixty-three million, six hundred thirty-one thousand, two hundred forty-three".