3656421169 has 2 divisors, whose sum is σ = 3656421170. Its totient is φ = 3656421168.

The previous prime is 3656421163. The next prime is 3656421221. The reversal of 3656421169 is 9611246563.

3656421169 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2571706944 + 1084714225 = 50712^2 + 32935^2 .

It is an emirp because it is prime and its reverse (9611246563) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3656421169 - 2¹⁵ = 3656388401 is a prime.

It is a super-2 number, since 2×3656421169² = 26738831530222653122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3656421163) 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 as a sum of consecutive naturals, namely, 1828210584 + 1828210585.

It is an arithmetic number, because the mean of its divisors is an integer number (1828210585).

Almost surely, 2^3656421169 is an apocalyptic number.

It is an amenable number.

3656421169 is a deficient number, since it is larger than the sum of its proper divisors (1).

3656421169 is an equidigital number, since it uses as much as digits as its factorization.

3656421169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 43.

The square root of 3656421169 is about 60468.3484891063. The cubic root of 3656421169 is about 1540.5840772341.

The spelling of 3656421169 in words is "three billion, six hundred fifty-six million, four hundred twenty-one thousand, one hundred sixty-nine".