191818044158 has 16 divisors (see below), whose sum is σ = 310286165280. Its totient is φ = 88409619936.

The previous prime is 191818044113. The next prime is 191818044163. The reversal of 191818044158 is 851440818191.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5055113 + ... + 5092916.

It is an arithmetic number, because the mean of its divisors is an integer number (19392885330).

Almost surely, 2^191818044158 is an apocalyptic number.

191818044158 is a deficient number, since it is larger than the sum of its proper divisors (118468121122).

191818044158 is a wasteful number, since it uses less digits than its factorization.

191818044158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10148771.

The product of its (nonzero) digits is 368640, while the sum is 50.

The spelling of 191818044158 in words is "one hundred ninety-one billion, eight hundred eighteen million, forty-four thousand, one hundred fifty-eight".