111818537423 has 2 divisors, whose sum is σ = 111818537424. Its totient is φ = 111818537422.

The previous prime is 111818537407. The next prime is 111818537447. The reversal of 111818537423 is 324735818111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111818537423 - 2⁴ = 111818537407 is a prime.

It is a super-2 number, since 2×111818537423² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111818537483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55909268711 + 55909268712.

It is an arithmetic number, because the mean of its divisors is an integer number (55909268712).

Almost surely, 2^111818537423 is an apocalyptic number.

111818537423 is a deficient number, since it is larger than the sum of its proper divisors (1).

111818537423 is an equidigital number, since it uses as much as digits as its factorization.

111818537423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 44.

The spelling of 111818537423 in words is "one hundred eleven billion, eight hundred eighteen million, five hundred thirty-seven thousand, four hundred twenty-three".