6436623642 has 8 divisors (see below), whose sum is σ = 12873247296. Its totient is φ = 2145541212.

The previous prime is 6436623619. The next prime is 6436623643. The reversal of 6436623642 is 2463266346.

6436623642 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

6436623642 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 6436623594 and 6436623603.

It is not an unprimeable number, because it can be changed into a prime (6436623643) 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 3 ways as a sum of consecutive naturals, for example, 536385298 + ... + 536385309.

It is an arithmetic number, because the mean of its divisors is an integer number (1609155912).

Almost surely, 2^6436623642 is an apocalyptic number.

6436623642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6436623642 is a wasteful number, since it uses less digits than its factorization.

6436623642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072770612.

The product of its digits is 746496, while the sum is 42.

The square root of 6436623642 is about 80228.5712324481. The cubic root of 6436623642 is about 1860.1702971604.

Adding to 6436623642 its reverse (2463266346), we get a palindrome (8899889988).

The spelling of 6436623642 in words is "six billion, four hundred thirty-six million, six hundred twenty-three thousand, six hundred forty-two".