44181989631 has 48 divisors (see below), whose sum is σ = 69069611520. Its totient is φ = 27053974080.

The previous prime is 44181989629. The next prime is 44181989641. The reversal of 44181989631 is 13698918144.

44181989631 is a `hidden beast` number, since 4 + 418 + 198 + 9 + 6 + 31 = 666.

It is not a de Polignac number, because 44181989631 - 2¹ = 44181989629 is a prime.

It is a super-2 number, since 2×44181989631² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44181989641) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 26503060 + ... + 26504726.

It is an arithmetic number, because the mean of its divisors is an integer number (1438950240).

Almost surely, 2^44181989631 is an apocalyptic number.

44181989631 is a deficient number, since it is larger than the sum of its proper divisors (24887621889).

44181989631 is a wasteful number, since it uses less digits than its factorization.

44181989631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2676 (or 2673 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 54.

The spelling of 44181989631 in words is "forty-four billion, one hundred eighty-one million, nine hundred eighty-nine thousand, six hundred thirty-one".