918191918159 has 2 divisors, whose sum is σ = 918191918160. Its totient is φ = 918191918158.

The previous prime is 918191918131. The next prime is 918191918221. The reversal of 918191918159 is 951819191819.

It is an a-pointer prime, because the next prime (918191918221) can be obtained adding 918191918159 to its sum of digits (62).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 918191918159 - 2¹² = 918191914063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (918191918359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459095959079 + 459095959080.

It is an arithmetic number, because the mean of its divisors is an integer number (459095959080).

Almost surely, 2^918191918159 is an apocalyptic number.

918191918159 is a deficient number, since it is larger than the sum of its proper divisors (1).

918191918159 is an equidigital number, since it uses as much as digits as its factorization.

918191918159 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2099520, while the sum is 62.

The spelling of 918191918159 in words is "nine hundred eighteen billion, one hundred ninety-one million, nine hundred eighteen thousand, one hundred fifty-nine".