81241336743 has 16 divisors (see below), whose sum is σ = 123873891840. Its totient is φ = 46394532576.

The previous prime is 81241336741. The next prime is 81241336747. The reversal of 81241336743 is 34763314218.

It is not a de Polignac number, because 81241336743 - 2¹ = 81241336741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81241336695 and 81241336704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81241336741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1177683 + ... + 1244756.

It is an arithmetic number, because the mean of its divisors is an integer number (7742118240).

Almost surely, 2^81241336743 is an apocalyptic number.

81241336743 is a deficient number, since it is larger than the sum of its proper divisors (42632555097).

81241336743 is a wasteful number, since it uses less digits than its factorization.

81241336743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2424046.

The product of its digits is 290304, while the sum is 42.

The spelling of 81241336743 in words is "eighty-one billion, two hundred forty-one million, three hundred thirty-six thousand, seven hundred forty-three".