191242741438 has 16 divisors (see below), whose sum is σ = 331224544224. Its totient is φ = 81116213760.

The previous prime is 191242741427. The next prime is 191242741441. The reversal of 191242741438 is 834147242191.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70412023 + ... + 70414738.

It is an arithmetic number, because the mean of its divisors is an integer number (20701534014).

Almost surely, 2^191242741438 is an apocalyptic number.

191242741438 is a deficient number, since it is larger than the sum of its proper divisors (139981802786).

191242741438 is a wasteful number, since it uses less digits than its factorization.

191242741438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140826867.

The product of its digits is 387072, while the sum is 46.

The spelling of 191242741438 in words is "one hundred ninety-one billion, two hundred forty-two million, seven hundred forty-one thousand, four hundred thirty-eight".