81092124349 has 16 divisors (see below), whose sum is σ = 84083940864. Its totient is φ = 78124608000.

The previous prime is 81092124343. The next prime is 81092124359. The reversal of 81092124349 is 94342129018.

It is a cyclic number.

It is not a de Polignac number, because 81092124349 - 2⁹ = 81092123837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81092124343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6495177 + ... + 6507649.

It is an arithmetic number, because the mean of its divisors is an integer number (5255246304).

Almost surely, 2^81092124349 is an apocalyptic number.

It is an amenable number.

81092124349 is a deficient number, since it is larger than the sum of its proper divisors (2991816515).

81092124349 is a wasteful number, since it uses less digits than its factorization.

81092124349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13428.

The product of its (nonzero) digits is 124416, while the sum is 43.

The spelling of 81092124349 in words is "eighty-one billion, ninety-two million, one hundred twenty-four thousand, three hundred forty-nine".