118424851991 has 2 divisors, whose sum is σ = 118424851992. Its totient is φ = 118424851990.

The previous prime is 118424851969. The next prime is 118424851997. The reversal of 118424851991 is 199158424811.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 118424851991 - 2⁶ = 118424851927 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118424851997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59212425995 + 59212425996.

It is an arithmetic number, because the mean of its divisors is an integer number (59212425996).

Almost surely, 2^118424851991 is an apocalyptic number.

118424851991 is a deficient number, since it is larger than the sum of its proper divisors (1).

118424851991 is an equidigital number, since it uses as much as digits as its factorization.

118424851991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 829440, while the sum is 53.

The spelling of 118424851991 in words is "one hundred eighteen billion, four hundred twenty-four million, eight hundred fifty-one thousand, nine hundred ninety-one".