3655721606 has 8 divisors (see below), whose sum is σ = 5487814200. Its totient is φ = 1826450208.

The previous prime is 3655721579. The next prime is 3655721609. The reversal of 3655721606 is 6061275563.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3655721609) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 702056 + ... + 707243.

It is an arithmetic number, because the mean of its divisors is an integer number (685976775).

Almost surely, 2^3655721606 is an apocalyptic number.

3655721606 is a deficient number, since it is larger than the sum of its proper divisors (1832092594).

3655721606 is a wasteful number, since it uses less digits than its factorization.

3655721606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1410598.

The product of its (nonzero) digits is 226800, while the sum is 41.

The square root of 3655721606 is about 60462.5636737312. The cubic root of 3655721606 is about 1540.4858204680.

The spelling of 3655721606 in words is "three billion, six hundred fifty-five million, seven hundred twenty-one thousand, six hundred six".