622545649 has 4 divisors (see below), whose sum is σ = 679140720. Its totient is φ = 565950580.

The previous prime is 622545641. The next prime is 622545727. The reversal of 622545649 is 946545226.

622545649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 622545649 - 2³ = 622545641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (622545641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28297519 + ... + 28297540.

It is an arithmetic number, because the mean of its divisors is an integer number (169785180).

Almost surely, 2^622545649 is an apocalyptic number.

It is an amenable number.

622545649 is a deficient number, since it is larger than the sum of its proper divisors (56595071).

622545649 is a wasteful number, since it uses less digits than its factorization.

622545649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56595070.

The product of its digits is 518400, while the sum is 43.

The square root of 622545649 is about 24950.8646944349. The cubic root of 622545649 is about 853.8673368436.

The spelling of 622545649 in words is "six hundred twenty-two million, five hundred forty-five thousand, six hundred forty-nine".