31644044118 has 32 divisors (see below), whose sum is σ = 70546245120. Its totient is φ = 10514092680.

The previous prime is 31644044083. The next prime is 31644044141. The reversal of 31644044118 is 81144044613.

It is a happy number.

31644044118 is a `hidden beast` number, since 3 + 1 + 644 + 0 + 4 + 4 + 1 + 1 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 925330 + ... + 958917.

It is an arithmetic number, because the mean of its divisors is an integer number (2204570160).

Almost surely, 2^31644044118 is an apocalyptic number.

31644044118 is an abundant number, since it is smaller than the sum of its proper divisors (38902201002).

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

31644044118 is a wasteful number, since it uses less digits than its factorization.

31644044118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1884569 (or 1884563 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The spelling of 31644044118 in words is "thirty-one billion, six hundred forty-four million, forty-four thousand, one hundred eighteen".