194071990158 has 12 divisors (see below), whose sum is σ = 420489312048. Its totient is φ = 64690663380.

The previous prime is 194071990141. The next prime is 194071990163. The reversal of 194071990158 is 851099170491.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5390888598 + ... + 5390888633.

It is an arithmetic number, because the mean of its divisors is an integer number (35040776004).

Almost surely, 2^194071990158 is an apocalyptic number.

194071990158 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

194071990158 is an abundant number, since it is smaller than the sum of its proper divisors (226417321890).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

194071990158 is a wasteful number, since it uses less digits than its factorization.

194071990158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10781777239 (or 10781777236 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 54.

The spelling of 194071990158 in words is "one hundred ninety-four billion, seventy-one million, nine hundred ninety thousand, one hundred fifty-eight".