111540332591 has 2 divisors, whose sum is σ = 111540332592. Its totient is φ = 111540332590.

The previous prime is 111540332543. The next prime is 111540332593. The reversal of 111540332591 is 195233045111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111540332591 - 2²⁶ = 111473223727 is a prime.

Together with 111540332593, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111540332593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55770166295 + 55770166296.

It is an arithmetic number, because the mean of its divisors is an integer number (55770166296).

Almost surely, 2^111540332591 is an apocalyptic number.

111540332591 is a deficient number, since it is larger than the sum of its proper divisors (1).

111540332591 is an equidigital number, since it uses as much as digits as its factorization.

111540332591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16200, while the sum is 35.

The spelling of 111540332591 in words is "one hundred eleven billion, five hundred forty million, three hundred thirty-two thousand, five hundred ninety-one".