82129485589 has 4 divisors (see below), whose sum is σ = 82130789356. Its totient is φ = 82128181824.

The previous prime is 82129485569. The next prime is 82129485593. The reversal of 82129485589 is 98558492128.

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

It can be written as a sum of positive squares in 2 ways, for example, as 72985344964 + 9144140625 = 270158^2 + 95625^2 .

It is a cyclic number.

It is not a de Polignac number, because 82129485589 - 2¹⁹ = 82128961301 is a prime.

It is a super-2 number, since 2×82129485589² (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 (82129485569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 552324 + ... + 685069.

It is an arithmetic number, because the mean of its divisors is an integer number (20532697339).

Almost surely, 2^82129485589 is an apocalyptic number.

It is an amenable number.

82129485589 is a deficient number, since it is larger than the sum of its proper divisors (1303767).

82129485589 is a wasteful number, since it uses less digits than its factorization.

82129485589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1303766.

The product of its digits is 16588800, while the sum is 61.

The spelling of 82129485589 in words is "eighty-two billion, one hundred twenty-nine million, four hundred eighty-five thousand, five hundred eighty-nine".