918822691549 has 24 divisors (see below), whose sum is σ = 1091271511680. Its totient is φ = 771185064384.

The previous prime is 918822691483. The next prime is 918822691559. The reversal of 918822691549 is 945196228819.

It is not a de Polignac number, because 918822691549 - 2¹⁷ = 918822560477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (918822691559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 426789 + ... + 1421194.

It is an arithmetic number, because the mean of its divisors is an integer number (45469646320).

Almost surely, 2^918822691549 is an apocalyptic number.

It is an amenable number.

918822691549 is a deficient number, since it is larger than the sum of its proper divisors (172448820131).

918822691549 is a wasteful number, since it uses less digits than its factorization.

918822691549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1848209 (or 1848202 counting only the distinct ones).

The product of its digits is 22394880, while the sum is 64.

The spelling of 918822691549 in words is "nine hundred eighteen billion, eight hundred twenty-two million, six hundred ninety-one thousand, five hundred forty-nine".