918454912991 has 24 divisors (see below), whose sum is σ = 1153843381152. Its totient is φ = 715628390400.

The previous prime is 918454912933. The next prime is 918454913011. The reversal of 918454912991 is 199219454819.

It is not a de Polignac number, because 918454912991 - 2³⁸ = 643577006047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (918454912901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15719111 + ... + 15777431.

It is an arithmetic number, because the mean of its divisors is an integer number (48076807548).

Almost surely, 2^918454912991 is an apocalyptic number.

918454912991 is a deficient number, since it is larger than the sum of its proper divisors (235388468161).

918454912991 is a wasteful number, since it uses less digits than its factorization.

918454912991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76943 (or 76932 counting only the distinct ones).

The product of its digits is 8398080, while the sum is 62.

The spelling of 918454912991 in words is "nine hundred eighteen billion, four hundred fifty-four million, nine hundred twelve thousand, nine hundred ninety-one".