4049639566 has 16 divisors (see below), whose sum is σ = 7129868256. Its totient is φ = 1688652576.

The previous prime is 4049639563. The next prime is 4049639579. The reversal of 4049639566 is 6659369404.

It is a super-2 number, since 2×4049639566² = 32799161229025336712, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4049639563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3908401 + ... + 3909436.

It is an arithmetic number, because the mean of its divisors is an integer number (445616766).

Almost surely, 2^4049639566 is an apocalyptic number.

4049639566 is a deficient number, since it is larger than the sum of its proper divisors (3080228690).

4049639566 is a wasteful number, since it uses less digits than its factorization.

4049639566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7817883.

The product of its (nonzero) digits is 4199040, while the sum is 52.

The square root of 4049639566 is about 63636.7784068301. The cubic root of 4049639566 is about 1593.9405661638.

The spelling of 4049639566 in words is "four billion, forty-nine million, six hundred thirty-nine thousand, five hundred sixty-six".