81920303589 has 8 divisors (see below), whose sum is σ = 109228460992. Its totient is φ = 54612840960.

The previous prime is 81920303527. The next prime is 81920303623. The reversal of 81920303589 is 98530302918.

It is a happy number.

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

It is not a de Polignac number, because 81920303589 - 2²⁹ = 81383432677 is a prime.

It is a super-2 number, since 2×81920303589² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81920303389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246984 + ... + 474174.

It is an arithmetic number, because the mean of its divisors is an integer number (13653557624).

Almost surely, 2^81920303589 is an apocalyptic number.

It is an amenable number.

81920303589 is a deficient number, since it is larger than the sum of its proper divisors (27308157403).

81920303589 is a wasteful number, since it uses less digits than its factorization.

81920303589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347387.

The product of its (nonzero) digits is 466560, while the sum is 48.

The spelling of 81920303589 in words is "eighty-one billion, nine hundred twenty million, three hundred three thousand, five hundred eighty-nine".