444722557818 has 64 divisors (see below), whose sum is σ = 1116896578560. Its totient is φ = 114681312000.

The previous prime is 444722557817. The next prime is 444722557819. The reversal of 444722557818 is 818755227444.

It is an interprime number because it is at equal distance from previous prime (444722557817) and next prime (444722557819).

It is a super-2 number, since 2×444722557818² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (444722557813) 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 31 ways as a sum of consecutive naturals, for example, 3398383 + ... + 3526818.

It is an arithmetic number, because the mean of its divisors is an integer number (17451509040).

Almost surely, 2^444722557818 is an apocalyptic number.

444722557818 is an abundant number, since it is smaller than the sum of its proper divisors (672174020742).

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

444722557818 is a wasteful number, since it uses less digits than its factorization.

444722557818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6925363.

The product of its digits is 20070400, while the sum is 57.

The spelling of 444722557818 in words is "four hundred forty-four billion, seven hundred twenty-two million, five hundred fifty-seven thousand, eight hundred eighteen".