3639220161 has 8 divisors (see below), whose sum is σ = 4965137760. Its totient is φ = 2369724672.

The previous prime is 3639220129. The next prime is 3639220267. The reversal of 3639220161 is 1610229363.

3639220161 is digitally balanced in base 2 and base 4, because in such bases 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 a de Polignac number, because 3639220161 - 2⁵ = 3639220129 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (3639220111) 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, 14105376 + ... + 14105633.

It is an arithmetic number, because the mean of its divisors is an integer number (620642220).

Almost surely, 2^3639220161 is an apocalyptic number.

It is an amenable number.

3639220161 is a deficient number, since it is larger than the sum of its proper divisors (1325917599).

3639220161 is a wasteful number, since it uses less digits than its factorization.

3639220161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28211055.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 3639220161 is about 60325.9493170228. The cubic root of 3639220161 is about 1538.1644742916.

The spelling of 3639220161 in words is "three billion, six hundred thirty-nine million, two hundred twenty thousand, one hundred sixty-one".