44181981361 has 12 divisors (see below), whose sum is σ = 51403584960. Its totient is φ = 37864213800.

The previous prime is 44181981331. The next prime is 44181981391. The reversal of 44181981361 is 16318918144.

It is an interprime number because it is at equal distance from previous prime (44181981331) and next prime (44181981391).

It is not a de Polignac number, because 44181981361 - 2⁵ = 44181981329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (44181981331) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 252180 + ... + 389818.

It is an arithmetic number, because the mean of its divisors is an integer number (4283632080).

Almost surely, 2^44181981361 is an apocalyptic number.

It is an amenable number.

44181981361 is a deficient number, since it is larger than the sum of its proper divisors (7221603599).

44181981361 is a wasteful number, since it uses less digits than its factorization.

44181981361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144204 (or 144197 counting only the distinct ones).

The product of its digits is 165888, while the sum is 46.

The spelling of 44181981361 in words is "forty-four billion, one hundred eighty-one million, nine hundred eighty-one thousand, three hundred sixty-one".