6404253633 has 32 divisors (see below), whose sum is σ = 9717206400. Its totient is φ = 4166443008.

The previous prime is 6404253623. The next prime is 6404253659. The reversal of 6404253633 is 3363524046.

6404253633 is a `hidden beast` number, since 640 + 4 + 2 + 5 + 3 + 6 + 3 + 3 = 666.

6404253633 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6404253633 - 2¹⁰ = 6404252609 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6404253623) 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 in 31 ways as a sum of consecutive naturals, for example, 1922113 + ... + 1925441.

It is an arithmetic number, because the mean of its divisors is an integer number (303662700).

Almost surely, 2^6404253633 is an apocalyptic number.

It is an amenable number.

6404253633 is a deficient number, since it is larger than the sum of its proper divisors (3312952767).

6404253633 is a wasteful number, since it uses less digits than its factorization.

6404253633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5038 (or 5032 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 36.

The square root of 6404253633 is about 80026.5807903849. The cubic root of 6404253633 is about 1857.0467676739.

Adding to 6404253633 its reverse (3363524046), we get a palindrome (9767777679).

The spelling of 6404253633 in words is "six billion, four hundred four million, two hundred fifty-three thousand, six hundred thirty-three".