44249912181 has 6 divisors (see below), whose sum is σ = 63916539830. Its totient is φ = 29499941448.

The previous prime is 44249912137. The next prime is 44249912183. The reversal of 44249912181 is 18121994244.

44249912181 is a `hidden beast` number, since 4 + 424 + 9 + 9 + 1 + 218 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 30508211556 + 13741700625 = 174666^2 + 117225^2 .

It is not a de Polignac number, because 44249912181 - 2²² = 44245717877 is a prime.

It is a super-2 number, since 2×44249912181² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44249912183) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2458328446 + ... + 2458328463.

Almost surely, 2^44249912181 is an apocalyptic number.

It is an amenable number.

44249912181 is a deficient number, since it is larger than the sum of its proper divisors (19666627649).

44249912181 is a wasteful number, since it uses less digits than its factorization.

44249912181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4916656915 (or 4916656912 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The spelling of 44249912181 in words is "forty-four billion, two hundred forty-nine million, nine hundred twelve thousand, one hundred eighty-one".