622645621 has 16 divisors (see below), whose sum is σ = 711474624. Its totient is φ = 539806464.

The previous prime is 622645607. The next prime is 622645663. The reversal of 622645621 is 126546226.

622645621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 622645621 - 2²¹ = 620548469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (622645601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112890 + ... + 118276.

It is an arithmetic number, because the mean of its divisors is an integer number (44467164).

Almost surely, 2^622645621 is an apocalyptic number.

It is an amenable number.

622645621 is a deficient number, since it is larger than the sum of its proper divisors (88829003).

622645621 is a wasteful number, since it uses less digits than its factorization.

622645621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5940.

The product of its digits is 34560, while the sum is 34.

The square root of 622645621 is about 24952.8679914754. The cubic root of 622645621 is about 853.9130407245.

The spelling of 622645621 in words is "six hundred twenty-two million, six hundred forty-five thousand, six hundred twenty-one".