3638468489 has 2 divisors, whose sum is σ = 3638468490. Its totient is φ = 3638468488.

The previous prime is 3638468473. The next prime is 3638468513. The reversal of 3638468489 is 9848648363.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3626448400 + 12020089 = 60220^2 + 3467^2 .

It is an emirp because it is prime and its reverse (9848648363) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3638468489 - 2⁴ = 3638468473 is a prime.

It is not a weakly prime, because it can be changed into another prime (3638468459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1819234244 + 1819234245.

It is an arithmetic number, because the mean of its divisors is an integer number (1819234245).

Almost surely, 2^3638468489 is an apocalyptic number.

It is an amenable number.

3638468489 is a deficient number, since it is larger than the sum of its proper divisors (1).

3638468489 is an equidigital number, since it uses as much as digits as its factorization.

3638468489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23887872, while the sum is 59.

The square root of 3638468489 is about 60319.7189068384. The cubic root of 3638468489 is about 1538.0585656328.

The spelling of 3638468489 in words is "three billion, six hundred thirty-eight million, four hundred sixty-eight thousand, four hundred eighty-nine".