638372745222 has 32 divisors (see below), whose sum is σ = 1347228643200. Its totient is φ = 201098490048.

The previous prime is 638372745187. The next prime is 638372745253. The reversal of 638372745222 is 222547273836.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6799048 + ... + 6892299.

It is an arithmetic number, because the mean of its divisors is an integer number (42100895100).

Almost surely, 2^638372745222 is an apocalyptic number.

638372745222 is an abundant number, since it is smaller than the sum of its proper divisors (708855897978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

638372745222 is a wasteful number, since it uses less digits than its factorization.

638372745222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13691780.

The product of its digits is 6773760, while the sum is 51.

The spelling of 638372745222 in words is "six hundred thirty-eight billion, three hundred seventy-two million, seven hundred forty-five thousand, two hundred twenty-two".