439990082181 has 24 divisors (see below), whose sum is σ = 694068875136. Its totient is φ = 266949557280.

The previous prime is 439990082149. The next prime is 439990082219. The reversal of 439990082181 is 181280099934.

It is not a de Polignac number, because 439990082181 - 2⁵ = 439990082149 is a prime.

It is a super-2 number, since 2×439990082181² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (439990082131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26474785 + ... + 26491398.

It is an arithmetic number, because the mean of its divisors is an integer number (28919536464).

Almost surely, 2^439990082181 is an apocalyptic number.

It is an amenable number.

439990082181 is a deficient number, since it is larger than the sum of its proper divisors (254078792955).

439990082181 is a wasteful number, since it uses less digits than its factorization.

439990082181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52966273 (or 52966270 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 54.

The spelling of 439990082181 in words is "four hundred thirty-nine billion, nine hundred ninety million, eighty-two thousand, one hundred eighty-one".