3638249811 has 32 divisors (see below), whose sum is σ = 6162854400. Its totient is φ = 2078036640.

The previous prime is 3638249753. The next prime is 3638249821. The reversal of 3638249811 is 1189428363.

3638249811 is a `hidden beast` number, since 3 + 638 + 2 + 4 + 9 + 8 + 1 + 1 = 666.

It is not a de Polignac number, because 3638249811 - 2⁹ = 3638249299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3638249821) 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 in 31 ways as a sum of consecutive naturals, for example, 688921 + ... + 694181.

It is an arithmetic number, because the mean of its divisors is an integer number (192589200).

Almost surely, 2^3638249811 is an apocalyptic number.

3638249811 is a deficient number, since it is larger than the sum of its proper divisors (2524604589).

3638249811 is a wasteful number, since it uses less digits than its factorization.

3638249811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8936 (or 8930 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 3638249811 is about 60317.9062219504. The cubic root of 3638249811 is about 1538.0277517239.

The spelling of 3638249811 in words is "three billion, six hundred thirty-eight million, two hundred forty-nine thousand, eight hundred eleven".