636422919919 has 8 divisors (see below), whose sum is σ = 636933013200. Its totient is φ = 635912928000.

The previous prime is 636422919911. The next prime is 636422919959. The reversal of 636422919919 is 919919224636.

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

It is a cyclic number.

It is not a de Polignac number, because 636422919919 - 2³ = 636422919911 is a prime.

It is a super-2 number, since 2×636422919919² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636422919911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16930357 + ... + 16967905.

It is an arithmetic number, because the mean of its divisors is an integer number (79616626650).

Almost surely, 2^636422919919 is an apocalyptic number.

636422919919 is a deficient number, since it is larger than the sum of its proper divisors (510093281).

636422919919 is a wasteful number, since it uses less digits than its factorization.

636422919919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50681.

The product of its digits is 11337408, while the sum is 61.

The spelling of 636422919919 in words is "six hundred thirty-six billion, four hundred twenty-two million, nine hundred nineteen thousand, nine hundred nineteen".