191444999159 has 4 divisors (see below), whose sum is σ = 191483501016. Its totient is φ = 191406497304.

The previous prime is 191444999131. The next prime is 191444999167. The reversal of 191444999159 is 951999444191.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-191444999159 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 191444999095 and 191444999104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191444999659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19243469 + ... + 19253414.

It is an arithmetic number, because the mean of its divisors is an integer number (47870875254).

Almost surely, 2^191444999159 is an apocalyptic number.

191444999159 is a deficient number, since it is larger than the sum of its proper divisors (38501857).

191444999159 is an equidigital number, since it uses as much as digits as its factorization.

191444999159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38501856.

The product of its digits is 18895680, while the sum is 65.

The spelling of 191444999159 in words is "one hundred ninety-one billion, four hundred forty-four million, nine hundred ninety-nine thousand, one hundred fifty-nine".