638802161700822 has 96 divisors (see below), whose sum is σ = 1606854681828864. Its totient is φ = 179632407628800.

The previous prime is 638802161700779. The next prime is 638802161700827. The reversal of 638802161700822 is 228007161208836.

638802161700822 is a `hidden beast` number, since 6 + 388 + 0 + 2 + 16 + 170 + 0 + 82 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638802161700827) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 56715504 + ... + 67039187.

It is an arithmetic number, because the mean of its divisors is an integer number (16738069602384).

Almost surely, 2^{638802161700822} is an apocalyptic number.

638802161700822 is an abundant number, since it is smaller than the sum of its proper divisors (968052520128042).

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

638802161700822 is a wasteful number, since it uses less digits than its factorization.

638802161700822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123755354 (or 123755351 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 54.

The spelling of 638802161700822 in words is "six hundred thirty-eight trillion, eight hundred two billion, one hundred sixty-one million, seven hundred thousand, eight hundred twenty-two".