81838419336242 has 8 divisors (see below), whose sum is σ = 128094917222016. Its totient is φ = 39140113595572.

The previous prime is 81838419336221. The next prime is 81838419336253. The reversal of 81838419336242 is 24263391483818.

81838419336242 is digitally balanced in base 3, 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 an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 889548036218 + ... + 889548036309.

It is an arithmetic number, because the mean of its divisors is an integer number (16011864652752).

Almost surely, 2^{81838419336242} is an apocalyptic number.

81838419336242 is a deficient number, since it is larger than the sum of its proper divisors (46256497885774).

81838419336242 is a wasteful number, since it uses less digits than its factorization.

81838419336242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1779096072552.

The product of its digits is 47775744, while the sum is 62.

The spelling of 81838419336242 in words is "eighty-one trillion, eight hundred thirty-eight billion, four hundred nineteen million, three hundred thirty-six thousand, two hundred forty-two".