18149178945 has 16 divisors (see below), whose sum is σ = 29044588032. Its totient is φ = 9677594880.

The previous prime is 18149178923. The next prime is 18149178989. The reversal of 18149178945 is 54987194181.

It is not a de Polignac number, because 18149178945 - 2⁹ = 18149178433 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45096 + ... + 195785.

It is an arithmetic number, because the mean of its divisors is an integer number (1815286752).

Almost surely, 2^18149178945 is an apocalyptic number.

18149178945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18149178945 is a deficient number, since it is larger than the sum of its proper divisors (10895409087).

18149178945 is a wasteful number, since it uses less digits than its factorization.

18149178945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245912.

The product of its digits is 2903040, while the sum is 57.

The spelling of 18149178945 in words is "eighteen billion, one hundred forty-nine million, one hundred seventy-eight thousand, nine hundred forty-five".