4447778849 has 2 divisors, whose sum is σ = 4447778850. Its totient is φ = 4447778848.

The previous prime is 4447778813. The next prime is 4447778869. The reversal of 4447778849 is 9488777444.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2381440000 + 2066338849 = 48800^2 + 45457^2 .

It is a cyclic number.

It is not a de Polignac number, because 4447778849 - 2³² = 152811553 is a prime.

It is a super-2 number, since 2×4447778849² = 39565473379223529602, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4447778791 and 4447778800.

It is not a weakly prime, because it can be changed into another prime (4447778809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2223889424 + 2223889425.

It is an arithmetic number, because the mean of its divisors is an integer number (2223889425).

Almost surely, 2^4447778849 is an apocalyptic number.

It is an amenable number.

4447778849 is a deficient number, since it is larger than the sum of its proper divisors (1).

4447778849 is an equidigital number, since it uses as much as digits as its factorization.

4447778849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50577408, while the sum is 62.

The square root of 4447778849 is about 66691.6700120787. The cubic root of 4447778849 is about 1644.5524475437.

The spelling of 4447778849 in words is "four billion, four hundred forty-seven million, seven hundred seventy-eight thousand, eight hundred forty-nine".