638583223167 has 6 divisors (see below), whose sum is σ = 922397989032. Its totient is φ = 425722148772.

The previous prime is 638583223139. The next prime is 638583223189. The reversal of 638583223167 is 761322385836.

It is a happy number.

638583223167 is a `hidden beast` number, since 6 + 3 + 8 + 583 + 22 + 31 + 6 + 7 = 666.

It is not a de Polignac number, because 638583223167 - 2⁸ = 638583222911 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638583223067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35476845723 + ... + 35476845740.

It is an arithmetic number, because the mean of its divisors is an integer number (153732998172).

Almost surely, 2^638583223167 is an apocalyptic number.

638583223167 is a deficient number, since it is larger than the sum of its proper divisors (283814765865).

638583223167 is a wasteful number, since it uses less digits than its factorization.

638583223167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70953691469 (or 70953691466 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 54.

The spelling of 638583223167 in words is "six hundred thirty-eight billion, five hundred eighty-three million, two hundred twenty-three thousand, one hundred sixty-seven".