4421969778 has 16 divisors (see below), whose sum is σ = 8846418816. Its totient is φ = 1473576720.

The previous prime is 4421969767. The next prime is 4421969791. The reversal of 4421969778 is 8779691244.

It is a happy number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 79701 + ... + 123272.

It is an arithmetic number, because the mean of its divisors is an integer number (552901176).

Almost surely, 2^4421969778 is an apocalyptic number.

4421969778 is an abundant number, since it is smaller than the sum of its proper divisors (4424449038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4421969778 is a wasteful number, since it uses less digits than its factorization.

4421969778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206609.

The product of its digits is 6096384, while the sum is 57.

The square root of 4421969778 is about 66497.8930342909. The cubic root of 4421969778 is about 1641.3653336192.

The spelling of 4421969778 in words is "four billion, four hundred twenty-one million, nine hundred sixty-nine thousand, seven hundred seventy-eight".