918744636222 has 24 divisors (see below), whose sum is σ = 2274986718576. Its totient is φ = 262498467456.

The previous prime is 918744636217. The next prime is 918744636239. The reversal of 918744636222 is 222636447819.

It is a happy number.

918744636222 is a `hidden beast` number, since 9 + 1 + 8 + 7 + 4 + 4 + 6 + 3 + 622 + 2 = 666.

It is a super-2 number, since 2×918744636222² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3645811923 + ... + 3645812174.

It is an arithmetic number, because the mean of its divisors is an integer number (94791113274).

Almost surely, 2^918744636222 is an apocalyptic number.

918744636222 is an abundant number, since it is smaller than the sum of its proper divisors (1356242082354).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

918744636222 is a wasteful number, since it uses less digits than its factorization.

918744636222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7291624112 (or 7291624109 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 54.

It can be divided in two parts, 918744 and 636222, that added together give a triangular number (1554966 = T₁₇₆₃).

The spelling of 918744636222 in words is "nine hundred eighteen billion, seven hundred forty-four million, six hundred thirty-six thousand, two hundred twenty-two".