638822036853 has 192 divisors, whose sum is σ = 1290684874752. Its totient is φ = 304928686080.

The previous prime is 638822036833. The next prime is 638822036869. The reversal of 638822036853 is 358630228836.

638822036853 is a `hidden beast` number, since 6 + 3 + 8 + 8 + 220 + 368 + 53 = 666.

It is not a de Polignac number, because 638822036853 - 2⁸ = 638822036597 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 638822036853.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638822036803) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 54237301 + ... + 54249077.

It is an arithmetic number, because the mean of its divisors is an integer number (6722317056).

Almost surely, 2^638822036853 is an apocalyptic number.

638822036853 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

638822036853 is an abundant number, since it is smaller than the sum of its proper divisors (651862837899).

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

638822036853 is a wasteful number, since it uses less digits than its factorization.

638822036853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12046 (or 12034 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 54.

The spelling of 638822036853 in words is "six hundred thirty-eight billion, eight hundred twenty-two million, thirty-six thousand, eight hundred fifty-three".