11391638353 has 2 divisors, whose sum is σ = 11391638354. Its totient is φ = 11391638352.

The previous prime is 11391638333. The next prime is 11391638407. The reversal of 11391638353 is 35383619311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6695003329 + 4696635024 = 81823^2 + 68532^2 .

It is a cyclic number.

It is not a de Polignac number, because 11391638353 - 2¹³ = 11391630161 is a prime.

It is not a weakly prime, because it can be changed into another prime (11391638333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5695819176 + 5695819177.

It is an arithmetic number, because the mean of its divisors is an integer number (5695819177).

Almost surely, 2^11391638353 is an apocalyptic number.

It is an amenable number.

11391638353 is a deficient number, since it is larger than the sum of its proper divisors (1).

11391638353 is an equidigital number, since it uses as much as digits as its factorization.

11391638353 is an evil number, because the sum of its binary digits is even.

The product of its digits is 174960, while the sum is 43.

The spelling of 11391638353 in words is "eleven billion, three hundred ninety-one million, six hundred thirty-eight thousand, three hundred fifty-three".