191023867441 has 4 divisors (see below), whose sum is σ = 208389673584. Its totient is φ = 173658061300.

The previous prime is 191023867387. The next prime is 191023867453. The reversal of 191023867441 is 144768320191.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 191023867441 - 2¹⁹ = 191023343153 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 191023867391 and 191023867400.

It is not an unprimeable number, because it can be changed into a prime (191023867141) 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, 8682903055 + ... + 8682903076.

It is an arithmetic number, because the mean of its divisors is an integer number (52097418396).

Almost surely, 2^191023867441 is an apocalyptic number.

191023867441 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

191023867441 is a deficient number, since it is larger than the sum of its proper divisors (17365806143).

191023867441 is a wasteful number, since it uses less digits than its factorization.

191023867441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17365806142.

The product of its (nonzero) digits is 290304, while the sum is 46.

The spelling of 191023867441 in words is "one hundred ninety-one billion, twenty-three million, eight hundred sixty-seven thousand, four hundred forty-one".