646612446 has 32 divisors (see below), whose sum is σ = 1405209600. Its totient is φ = 197605440.

The previous prime is 646612441. The next prime is 646612453. The reversal of 646612446 is 644216646.

646612446 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646612441) 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, 87951 + ... + 95018.

It is an arithmetic number, because the mean of its divisors is an integer number (43912800).

Almost surely, 2^646612446 is an apocalyptic number.

646612446 is an abundant number, since it is smaller than the sum of its proper divisors (758597154).

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

646612446 is a wasteful number, since it uses less digits than its factorization.

646612446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183024.

The product of its digits is 165888, while the sum is 39.

The square root of 646612446 is about 25428.5753828247. The cubic root of 646612446 is about 864.7316467392.

The spelling of 646612446 in words is "six hundred forty-six million, six hundred twelve thousand, four hundred forty-six".