638822222085 has 32 divisors (see below), whose sum is σ = 1076037557760. Its totient is φ = 322735399488.

The previous prime is 638822222081. The next prime is 638822222117. The reversal of 638822222085 is 580222228836.

It is not a de Polignac number, because 638822222085 - 2² = 638822222081 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638822222081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2381542 + ... + 2636168.

It is an arithmetic number, because the mean of its divisors is an integer number (33626173680).

Almost surely, 2^638822222085 is an apocalyptic number.

It is an amenable number.

638822222085 is a deficient number, since it is larger than the sum of its proper divisors (437215335675).

638822222085 is a wasteful number, since it uses less digits than its factorization.

638822222085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263457.

The product of its (nonzero) digits is 1474560, while the sum is 48.

The spelling of 638822222085 in words is "six hundred thirty-eight billion, eight hundred twenty-two million, two hundred twenty-two thousand, eighty-five".