11638614643 has 2 divisors, whose sum is σ = 11638614644. Its totient is φ = 11638614642.

The previous prime is 11638614641. The next prime is 11638614667. The reversal of 11638614643 is 34641683611.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11638614643 - 2¹ = 11638614641 is a prime.

Together with 11638614641, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 11638614643.

It is not a weakly prime, because it can be changed into another prime (11638614641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5819307321 + 5819307322.

It is an arithmetic number, because the mean of its divisors is an integer number (5819307322).

Almost surely, 2^11638614643 is an apocalyptic number.

11638614643 is a deficient number, since it is larger than the sum of its proper divisors (1).

11638614643 is an equidigital number, since it uses as much as digits as its factorization.

11638614643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 43.

The spelling of 11638614643 in words is "eleven billion, six hundred thirty-eight million, six hundred fourteen thousand, six hundred forty-three".