638775227432 has 64 divisors (see below), whose sum is σ = 1233395475840. Its totient is φ = 309917664000.

The previous prime is 638775227429. The next prime is 638775227479. The reversal of 638775227432 is 234722577836.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 271010798 + ... + 271013154.

It is an arithmetic number, because the mean of its divisors is an integer number (19271804310).

Almost surely, 2^638775227432 is an apocalyptic number.

It is an amenable number.

638775227432 is a deficient number, since it is larger than the sum of its proper divisors (594620248408).

638775227432 is a wasteful number, since it uses less digits than its factorization.

638775227432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4482 (or 4478 counting only the distinct ones).

The product of its digits is 23708160, while the sum is 56.

The spelling of 638775227432 in words is "six hundred thirty-eight billion, seven hundred seventy-five million, two hundred twenty-seven thousand, four hundred thirty-two".