191142489728 has 32 divisors (see below), whose sum is σ = 381487964160. Its totient is φ = 95396491008.

The previous prime is 191142489719. The next prime is 191142489737. The reversal of 191142489728 is 827984241191.

191142489728 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (191142489719) and next prime (191142489737).

It is a tau number, because it is divible by the number of its divisors (32).

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 3 ways as a sum of consecutive naturals, for example, 1294976 + ... + 1435007.

It is an arithmetic number, because the mean of its divisors is an integer number (11921498880).

Almost surely, 2^191142489728 is an apocalyptic number.

It is an amenable number.

191142489728 is a deficient number, since it is larger than the sum of its proper divisors (190345474432).

191142489728 is an equidigital number, since it uses as much as digits as its factorization.

191142489728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2730544 (or 2730532 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 56.

The spelling of 191142489728 in words is "one hundred ninety-one billion, one hundred forty-two million, four hundred eighty-nine thousand, seven hundred twenty-eight".