5638721022 has 48 divisors (see below), whose sum is σ = 13336388208. Its totient is φ = 1707613440.

The previous prime is 5638720993. The next prime is 5638721027. The reversal of 5638721022 is 2201278365.

5638721022 is a `hidden beast` number, since 5 + 638 + 7 + 2 + 10 + 2 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5638721027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 334918 + ... + 351350.

It is an arithmetic number, because the mean of its divisors is an integer number (277841421).

Almost surely, 2^5638721022 is an apocalyptic number.

5638721022 is an abundant number, since it is smaller than the sum of its proper divisors (7697667186).

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

5638721022 is a wasteful number, since it uses less digits than its factorization.

5638721022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18185 (or 18182 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 5638721022 is about 75091.4177652813. The cubic root of 5638721022 is about 1779.8915287601.

Adding to 5638721022 its reverse (2201278365), we get a palindrome (7839999387).

The spelling of 5638721022 in words is "five billion, six hundred thirty-eight million, seven hundred twenty-one thousand, twenty-two".