3855662649 has 12 divisors (see below), whose sum is σ = 5574769200. Its totient is φ = 2567913144.

The previous prime is 3855662623. The next prime is 3855662659. The reversal of 3855662649 is 9462665583.

3855662649 is a `hidden beast` number, since 3 + 8 + 5 + 5 + 6 + 626 + 4 + 9 = 666.

3855662649 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3855662649 - 2⁷ = 3855662521 is a prime.

It is a super-2 number, since 2×3855662649² = 29732268925787394402, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3855662595 and 3855662604.

It is not an unprimeable number, because it can be changed into a prime (3855662659) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 201039 + ... + 219380.

It is an arithmetic number, because the mean of its divisors is an integer number (464564100).

Almost surely, 2^3855662649 is an apocalyptic number.

It is an amenable number.

3855662649 is a deficient number, since it is larger than the sum of its proper divisors (1719106551).

3855662649 is a wasteful number, since it uses less digits than its factorization.

3855662649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421444 (or 421441 counting only the distinct ones).

The product of its digits is 9331200, while the sum is 54.

The square root of 3855662649 is about 62093.9823896004. The cubic root of 3855662649 is about 1568.0732376821.

The spelling of 3855662649 in words is "three billion, eight hundred fifty-five million, six hundred sixty-two thousand, six hundred forty-nine".