918446221439946 has 32 divisors (see below), whose sum is σ = 2049531317049600. Its totient is φ = 304867783402560.

The previous prime is 918446221439933. The next prime is 918446221439947. The reversal of 918446221439946 is 649934122644819.

918446221439946 is a `hidden beast` number, since 9 + 1 + 8 + 4 + 4 + 6 + 221 + 4 + 399 + 4 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (918446221439947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35582128015 + ... + 35582153826.

It is an arithmetic number, because the mean of its divisors is an integer number (64047853657800).

Almost surely, 2^{918446221439946} is an apocalyptic number.

918446221439946 is an abundant number, since it is smaller than the sum of its proper divisors (1131085095609654).

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

918446221439946 is a wasteful number, since it uses less digits than its factorization.

918446221439946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71164282091 (or 71164282085 counting only the distinct ones).

The product of its digits is 644972544, while the sum is 72.

The spelling of 918446221439946 in words is "nine hundred eighteen trillion, four hundred forty-six billion, two hundred twenty-one million, four hundred thirty-nine thousand, nine hundred forty-six".