18081774441 has 12 divisors (see below), whose sum is σ = 27492756720. Its totient is φ = 11420067960.

The previous prime is 18081774437. The next prime is 18081774497. The reversal of 18081774441 is 14447718081.

It is not a de Polignac number, because 18081774441 - 2² = 18081774437 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (18081774041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52870515 + ... + 52870856.

It is an arithmetic number, because the mean of its divisors is an integer number (2291063060).

Almost surely, 2^18081774441 is an apocalyptic number.

It is an amenable number.

18081774441 is a deficient number, since it is larger than the sum of its proper divisors (9410982279).

18081774441 is a wasteful number, since it uses less digits than its factorization.

18081774441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105741396 (or 105741393 counting only the distinct ones).

The product of its (nonzero) digits is 200704, while the sum is 45.

The spelling of 18081774441 in words is "eighteen billion, eighty-one million, seven hundred seventy-four thousand, four hundred forty-one".