118318819897 has 2 divisors, whose sum is σ = 118318819898. Its totient is φ = 118318819896.

The previous prime is 118318819867. The next prime is 118318819973. The reversal of 118318819897 is 798918813811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101492579241 + 16826240656 = 318579^2 + 129716^2 .

It is a cyclic number.

It is not a de Polignac number, because 118318819897 - 2⁷ = 118318819769 is a prime.

It is not a weakly prime, because it can be changed into another prime (118318819807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59159409948 + 59159409949.

It is an arithmetic number, because the mean of its divisors is an integer number (59159409949).

Almost surely, 2^118318819897 is an apocalyptic number.

It is an amenable number.

118318819897 is a deficient number, since it is larger than the sum of its proper divisors (1).

118318819897 is an equidigital number, since it uses as much as digits as its factorization.

118318819897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6967296, while the sum is 64.

The spelling of 118318819897 in words is "one hundred eighteen billion, three hundred eighteen million, eight hundred nineteen thousand, eight hundred ninety-seven".