83561822849 has 2 divisors, whose sum is σ = 83561822850. Its totient is φ = 83561822848.

The previous prime is 83561822821. The next prime is 83561822873. The reversal of 83561822849 is 94822816538.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81072311824 + 2489511025 = 284732^2 + 49895^2 .

It is a cyclic number.

It is not a de Polignac number, because 83561822849 - 2²⁸ = 83293387393 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 83561822794 and 83561822803.

It is not a weakly prime, because it can be changed into another prime (83561822809) 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 as a sum of consecutive naturals, namely, 41780911424 + 41780911425.

It is an arithmetic number, because the mean of its divisors is an integer number (41780911425).

Almost surely, 2^83561822849 is an apocalyptic number.

It is an amenable number.

83561822849 is a deficient number, since it is larger than the sum of its proper divisors (1).

83561822849 is an equidigital number, since it uses as much as digits as its factorization.

83561822849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6635520, while the sum is 56.

The spelling of 83561822849 in words is "eighty-three billion, five hundred sixty-one million, eight hundred twenty-two thousand, eight hundred forty-nine".