191172034242 has 96 divisors (see below), whose sum is σ = 483746919552. Its totient is φ = 53430354432.

The previous prime is 191172034237. The next prime is 191172034267. The reversal of 191172034242 is 242430271191.

191172034242 is a `hidden beast` number, since 19 + 1 + 17 + 203 + 424 + 2 = 666.

It is a super-4 number, since 4×191172034242⁴ (a number of 46 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 191172034197 and 191172034206.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2208013 + ... + 2292959.

It is an arithmetic number, because the mean of its divisors is an integer number (5039030412).

Almost surely, 2^191172034242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 191172034242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241873459776).

191172034242 is an abundant number, since it is smaller than the sum of its proper divisors (292574885310).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

191172034242 is a wasteful number, since it uses less digits than its factorization.

191172034242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85352 (or 85349 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The spelling of 191172034242 in words is "one hundred ninety-one billion, one hundred seventy-two million, thirty-four thousand, two hundred forty-two".