11775279643 has 2 divisors, whose sum is σ = 11775279644. Its totient is φ = 11775279642.

The previous prime is 11775279641. The next prime is 11775279679. The reversal of 11775279643 is 34697257711.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (34697257711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11775279643 - 2¹ = 11775279641 is a prime.

Together with 11775279641, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11775279641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5887639821 + 5887639822.

It is an arithmetic number, because the mean of its divisors is an integer number (5887639822).

Almost surely, 2^11775279643 is an apocalyptic number.

11775279643 is a deficient number, since it is larger than the sum of its proper divisors (1).

11775279643 is an equidigital number, since it uses as much as digits as its factorization.

11775279643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2222640, while the sum is 52.

The spelling of 11775279643 in words is "eleven billion, seven hundred seventy-five million, two hundred seventy-nine thousand, six hundred forty-three".