27779322449 has 4 divisors (see below), whose sum is σ = 27982091364. Its totient is φ = 27576553536.

The previous prime is 27779322443. The next prime is 27779322503. The reversal of 27779322449 is 94422397772.

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 18297431824 + 9481890625 = 135268^2 + 97375^2 .

It is a cyclic number.

It is not a de Polignac number, because 27779322449 - 2²⁸ = 27510886993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27779322394 and 27779322403.

It is not an unprimeable number, because it can be changed into a prime (27779322443) 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, 101384252 + ... + 101384525.

It is an arithmetic number, because the mean of its divisors is an integer number (6995522841).

Almost surely, 2^27779322449 is an apocalyptic number.

It is an amenable number.

27779322449 is a deficient number, since it is larger than the sum of its proper divisors (202768915).

27779322449 is a wasteful number, since it uses less digits than its factorization.

27779322449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202768914.

The product of its digits is 10668672, while the sum is 56.

The spelling of 27779322449 in words is "twenty-seven billion, seven hundred seventy-nine million, three hundred twenty-two thousand, four hundred forty-nine".