4421049778 has 4 divisors (see below), whose sum is σ = 6631574670. Its totient is φ = 2210524888.

The previous prime is 4421049761. The next prime is 4421049791. The reversal of 4421049778 is 8779401244.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2984109129 + 1436940649 = 54627^2 + 37907^2 .

It is a super-2 number, since 2×4421049778² = 39091362279107698568, which contains 22 as substring.

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 as a sum of consecutive naturals, namely, 1105262443 + ... + 1105262446.

Almost surely, 2^4421049778 is an apocalyptic number.

4421049778 is a deficient number, since it is larger than the sum of its proper divisors (2210524892).

4421049778 is a wasteful number, since it uses less digits than its factorization.

4421049778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2210524891.

The product of its (nonzero) digits is 451584, while the sum is 46.

The square root of 4421049778 is about 66490.9751620474. The cubic root of 4421049778 is about 1641.2514959014.

The spelling of 4421049778 in words is "four billion, four hundred twenty-one million, forty-nine thousand, seven hundred seventy-eight".