18319178125905 has 48 divisors (see below), whose sum is σ = 30358663470720. Its totient is φ = 9432574068736.

The previous prime is 18319178125889. The next prime is 18319178125957. The reversal of 18319178125905 is 50952187191381.

It is not a de Polignac number, because 18319178125905 - 2⁴ = 18319178125889 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 47 ways as a sum of consecutive naturals, for example, 181214404 + ... + 181315466.

It is an arithmetic number, because the mean of its divisors is an integer number (632472155640).

Almost surely, 2^{18319178125905} is an apocalyptic number.

18319178125905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18319178125905 is a deficient number, since it is larger than the sum of its proper divisors (12039485344815).

18319178125905 is a wasteful number, since it uses less digits than its factorization.

18319178125905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115498 (or 115469 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 60.

The spelling of 18319178125905 in words is "eighteen trillion, three hundred nineteen billion, one hundred seventy-eight million, one hundred twenty-five thousand, nine hundred five".