191233709481 has 8 divisors (see below), whose sum is σ = 255394233280. Its totient is φ = 127281162672.

The previous prime is 191233709453. The next prime is 191233709483. The reversal of 191233709481 is 184907332191.

191233709481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 191233709481 - 2¹¹ = 191233707433 is a prime.

It is a super-2 number, since 2×191233709481² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 191233709481.

It is not an unprimeable number, because it can be changed into a prime (191233709483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51992101 + ... + 51995778.

It is an arithmetic number, because the mean of its divisors is an integer number (31924279160).

Almost surely, 2^191233709481 is an apocalyptic number.

It is an amenable number.

191233709481 is a deficient number, since it is larger than the sum of its proper divisors (64160523799).

191233709481 is a wasteful number, since it uses less digits than its factorization.

191233709481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103988495.

The product of its (nonzero) digits is 326592, while the sum is 48.

The spelling of 191233709481 in words is "one hundred ninety-one billion, two hundred thirty-three million, seven hundred nine thousand, four hundred eighty-one".