6423640635 has 64 divisors (see below), whose sum is σ = 10728806400. Its totient is φ = 3279462912.

The previous prime is 6423640589. The next prime is 6423640637. The reversal of 6423640635 is 5360463246.

It is not a de Polignac number, because 6423640635 - 2⁷ = 6423640507 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6423640593 and 6423640602.

It is not an unprimeable number, because it can be changed into a prime (6423640637) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16180257 + ... + 16180653.

It is an arithmetic number, because the mean of its divisors is an integer number (167637600).

Almost surely, 2^6423640635 is an apocalyptic number.

6423640635 is a deficient number, since it is larger than the sum of its proper divisors (4305165765).

6423640635 is a wasteful number, since it uses less digits than its factorization.

6423640635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900.

The product of its (nonzero) digits is 311040, while the sum is 39.

The square root of 6423640635 is about 80147.6177749532. The cubic root of 6423640635 is about 1858.9187683450.

The spelling of 6423640635 in words is "six billion, four hundred twenty-three million, six hundred forty thousand, six hundred thirty-five".