3643999999 has 2 divisors, whose sum is σ = 3644000000. Its totient is φ = 3643999998.

The previous prime is 3643999991. The next prime is 3644000011. The reversal of 3643999999 is 9999993463.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (9999993463) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3643999999 - 2³ = 3643999991 is a prime.

3643999999 is a modest number, since divided by 99999 gives 36439 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3643999991) 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, 1821999999 + 1822000000.

It is an arithmetic number, because the mean of its divisors is an integer number (1822000000).

Almost surely, 2^3643999999 is an apocalyptic number.

3643999999 is a deficient number, since it is larger than the sum of its proper divisors (1).

3643999999 is an equidigital number, since it uses as much as digits as its factorization.

3643999999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 114791256, while the sum is 70.

The square root of 3643999999 is about 60365.5530828634. The cubic root of 3643999999 is about 1538.8376002348.

The spelling of 3643999999 in words is "three billion, six hundred forty-three million, nine hundred ninety-nine thousand, nine hundred ninety-nine".