191341854721 has 8 divisors (see below), whose sum is σ = 191800224000. Its totient is φ = 190883588640.

The previous prime is 191341854719. The next prime is 191341854749. The reversal of 191341854721 is 127458143191.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 191341854721 - 2¹ = 191341854719 is a prime.

It is a super-2 number, since 2×191341854721² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (191341854701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4720581 + ... + 4760941.

It is an arithmetic number, because the mean of its divisors is an integer number (23975028000).

Almost surely, 2^191341854721 is an apocalyptic number.

It is an amenable number.

191341854721 is a deficient number, since it is larger than the sum of its proper divisors (458369279).

191341854721 is a wasteful number, since it uses less digits than its factorization.

191341854721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51599.

The product of its digits is 241920, while the sum is 46.

The spelling of 191341854721 in words is "one hundred ninety-one billion, three hundred forty-one million, eight hundred fifty-four thousand, seven hundred twenty-one".