3649205866 has 8 divisors (see below), whose sum is σ = 5590272960. Its totient is φ = 1785781548.

The previous prime is 3649205837. The next prime is 3649205869. The reversal of 3649205866 is 6685029463.

3649205866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (3649205869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19410576 + ... + 19410763.

It is an arithmetic number, because the mean of its divisors is an integer number (698784120).

Almost surely, 2^3649205866 is an apocalyptic number.

3649205866 is a deficient number, since it is larger than the sum of its proper divisors (1941067094).

3649205866 is a wasteful number, since it uses less digits than its factorization.

3649205866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38821388.

The product of its (nonzero) digits is 1866240, while the sum is 49.

The square root of 3649205866 is about 60408.6572107012. The cubic root of 3649205866 is about 1539.5700528548.

The spelling of 3649205866 in words is "three billion, six hundred forty-nine million, two hundred five thousand, eight hundred sixty-six".