82027289549 has 4 divisors (see below), whose sum is σ = 82379338236. Its totient is φ = 81675240864.

The previous prime is 82027289503. The next prime is 82027289579. The reversal of 82027289549 is 94598272028.

It is a happy number.

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 33066876649 + 48960412900 = 181843^2 + 221270^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82027289549 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 82027289494 and 82027289503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82027289579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176023994 + ... + 176024459.

It is an arithmetic number, because the mean of its divisors is an integer number (20594834559).

Almost surely, 2^82027289549 is an apocalyptic number.

It is an amenable number.

82027289549 is a deficient number, since it is larger than the sum of its proper divisors (352048687).

82027289549 is a wasteful number, since it uses less digits than its factorization.

82027289549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352048686.

The product of its (nonzero) digits is 5806080, while the sum is 56.

The spelling of 82027289549 in words is "eighty-two billion, twenty-seven million, two hundred eighty-nine thousand, five hundred forty-nine".