191989011404 has 12 divisors (see below), whose sum is σ = 335984164824. Its totient is φ = 95993535744.

The previous prime is 191989011349. The next prime is 191989011451. The reversal of 191989011404 is 404110989191.

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 3 ways as a sum of consecutive naturals, for example, 380972 + ... + 727404.

It is an arithmetic number, because the mean of its divisors is an integer number (27998680402).

Almost surely, 2^191989011404 is an apocalyptic number.

It is an amenable number.

191989011404 is a deficient number, since it is larger than the sum of its proper divisors (143995153420).

191989011404 is a wasteful number, since it uses less digits than its factorization.

191989011404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484984 (or 484982 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 47.

The spelling of 191989011404 in words is "one hundred ninety-one billion, nine hundred eighty-nine million, eleven thousand, four hundred four".