194820131985 has 8 divisors (see below), whose sum is σ = 311712211200. Its totient is φ = 103904070384.

The previous prime is 194820131959. The next prime is 194820132037. The reversal of 194820131985 is 589131028491.

194820131985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 194820131985 - 2⁵ = 194820131953 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 6494004385 + ... + 6494004414.

It is an arithmetic number, because the mean of its divisors is an integer number (38964026400).

Almost surely, 2^194820131985 is an apocalyptic number.

194820131985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

194820131985 is a deficient number, since it is larger than the sum of its proper divisors (116892079215).

194820131985 is a wasteful number, since it uses less digits than its factorization.

194820131985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12988008807.

The product of its (nonzero) digits is 622080, while the sum is 51.

The spelling of 194820131985 in words is "one hundred ninety-four billion, eight hundred twenty million, one hundred thirty-one thousand, nine hundred eighty-five".