444091491768 has 64 divisors (see below), whose sum is σ = 1138846210560. Its totient is φ = 144242587136.

The previous prime is 444091491761. The next prime is 444091491769. The reversal of 444091491768 is 867194190444.

It is a super-2 number, since 2×444091491768² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444091491761) 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, 611121 + ... + 1123232.

It is an arithmetic number, because the mean of its divisors is an integer number (17794472040).

Almost surely, 2^444091491768 is an apocalyptic number.

It is an amenable number.

444091491768 is an abundant number, since it is smaller than the sum of its proper divisors (694754718792).

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

444091491768 is a wasteful number, since it uses less digits than its factorization.

444091491768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1734636 (or 1734632 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 57.

The spelling of 444091491768 in words is "four hundred forty-four billion, ninety-one million, four hundred ninety-one thousand, seven hundred sixty-eight".