646244606 has 32 divisors (see below), whose sum is σ = 1171272960. Its totient is φ = 261233856.

The previous prime is 646244563. The next prime is 646244611. The reversal of 646244606 is 606442646.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 646244606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56765 + ... + 67191.

It is an arithmetic number, because the mean of its divisors is an integer number (36602280).

Almost surely, 2^646244606 is an apocalyptic number.

646244606 is a deficient number, since it is larger than the sum of its proper divisors (525028354).

646244606 is a wasteful number, since it uses less digits than its factorization.

646244606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10688.

The product of its (nonzero) digits is 165888, while the sum is 38.

The square root of 646244606 is about 25421.3415460318. The cubic root of 646244606 is about 864.5676416353.

The spelling of 646244606 in words is "six hundred forty-six million, two hundred forty-four thousand, six hundred six".