191242741439 has 8 divisors (see below), whose sum is σ = 198163263360. Its totient is φ = 184343949216.

The previous prime is 191242741427. The next prime is 191242741441. The reversal of 191242741439 is 934147242191.

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

It is a de Polignac number, because none of the positive numbers 2^k-191242741439 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 191242741393 and 191242741402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191242741939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5414504 + ... + 5449709.

It is an arithmetic number, because the mean of its divisors is an integer number (24770407920).

Almost surely, 2^191242741439 is an apocalyptic number.

191242741439 is a deficient number, since it is larger than the sum of its proper divisors (6920521921).

191242741439 is a wasteful number, since it uses less digits than its factorization.

191242741439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10864849.

The product of its digits is 435456, while the sum is 47.

The spelling of 191242741439 in words is "one hundred ninety-one billion, two hundred forty-two million, seven hundred forty-one thousand, four hundred thirty-nine".