3638268009 has 10 divisors (see below), whose sum is σ = 5434943690. Its totient is φ = 2425511952.

The previous prime is 3638267989. The next prime is 3638268031. The reversal of 3638268009 is 9008628363.

3638268009 is a `hidden beast` number, since 3 + 638 + 2 + 6 + 8 + 0 + 0 + 9 = 666.

3638268009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2289909609 + 1348358400 = 47853^2 + 36720^2 .

It is not a de Polignac number, because 3638268009 - 2¹⁷ = 3638136937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3638268709) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 22458364 + ... + 22458525.

It is an arithmetic number, because the mean of its divisors is an integer number (543494369).

Almost surely, 2^3638268009 is an apocalyptic number.

It is an amenable number.

3638268009 is a deficient number, since it is larger than the sum of its proper divisors (1796675681).

3638268009 is an equidigital number, since it uses as much as digits as its factorization.

3638268009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44916901 (or 44916892 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 3638268009 is about 60318.0570724887. The cubic root of 3638268009 is about 1538.0303160505.

The spelling of 3638268009 in words is "three billion, six hundred thirty-eight million, two hundred sixty-eight thousand, nine".