638583223247 has 8 divisors (see below), whose sum is σ = 654213499632. Its totient is φ = 622955569600.

The previous prime is 638583223211. The next prime is 638583223253. The reversal of 638583223247 is 742322385836.

It is a happy number.

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 638583223247 - 2¹⁶ = 638583157711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638583223547) 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, 158204 + ... + 1141137.

It is an arithmetic number, because the mean of its divisors is an integer number (81776687454).

Almost surely, 2^638583223247 is an apocalyptic number.

638583223247 is a deficient number, since it is larger than the sum of its proper divisors (15630276385).

638583223247 is a wasteful number, since it uses less digits than its factorization.

638583223247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1311369.

The product of its digits is 11612160, while the sum is 53.

The spelling of 638583223247 in words is "six hundred thirty-eight billion, five hundred eighty-three million, two hundred twenty-three thousand, two hundred forty-seven".