81092742829 has 8 divisors (see below), whose sum is σ = 94649280768. Its totient is φ = 68029170000.

The previous prime is 81092742827. The next prime is 81092742839. The reversal of 81092742829 is 92824729018.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 81092742829 - 2¹ = 81092742827 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81092742827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123240922 + ... + 123241579.

It is an arithmetic number, because the mean of its divisors is an integer number (11831160096).

Almost surely, 2^81092742829 is an apocalyptic number.

It is an amenable number.

81092742829 is a deficient number, since it is larger than the sum of its proper divisors (13556537939).

81092742829 is a wasteful number, since it uses less digits than its factorization.

81092742829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246482555.

The product of its (nonzero) digits is 1161216, while the sum is 52.

The spelling of 81092742829 in words is "eighty-one billion, ninety-two million, seven hundred forty-two thousand, eight hundred twenty-nine".