81802162222303 has 4 divisors (see below), whose sum is σ = 81816710007088. Its totient is φ = 81787614437520.

The previous prime is 81802162222267. The next prime is 81802162222343. The reversal of 81802162222303 is 30322226120818.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81802162222303 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 (81802162222343) 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 3 ways as a sum of consecutive naturals, for example, 7273883958 + ... + 7273895203.

It is an arithmetic number, because the mean of its divisors is an integer number (20454177501772).

Almost surely, 2^{81802162222303} is an apocalyptic number.

81802162222303 is a deficient number, since it is larger than the sum of its proper divisors (14547784785).

81802162222303 is a wasteful number, since it uses less digits than its factorization.

81802162222303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14547784784.

The product of its (nonzero) digits is 110592, while the sum is 40.

The spelling of 81802162222303 in words is "eighty-one trillion, eight hundred two billion, one hundred sixty-two million, two hundred twenty-two thousand, three hundred three".