6421523622 has 16 divisors (see below), whose sum is σ = 12855074160. Its totient is φ = 2138503392.

The previous prime is 6421523609. The next prime is 6421523627. The reversal of 6421523622 is 2263251246.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6421523627) 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 7 ways as a sum of consecutive naturals, for example, 494173 + ... + 507000.

It is an arithmetic number, because the mean of its divisors is an integer number (803442135).

Almost surely, 2^6421523622 is an apocalyptic number.

6421523622 is an abundant number, since it is smaller than the sum of its proper divisors (6433550538).

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

6421523622 is a wasteful number, since it uses less digits than its factorization.

6421523622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1002247.

The product of its digits is 34560, while the sum is 33.

The square root of 6421523622 is about 80134.4097251611. The cubic root of 6421523622 is about 1858.7145338191.

Adding to 6421523622 its reverse (2263251246), we get a palindrome (8684774868).

The spelling of 6421523622 in words is "six billion, four hundred twenty-one million, five hundred twenty-three thousand, six hundred twenty-two".