646250641 has 8 divisors (see below), whose sum is σ = 651819168. Its totient is φ = 640692000.

The previous prime is 646250623. The next prime is 646250687. The reversal of 646250641 is 146052646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 646250641 - 2⁵ = 646250609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 646250597 and 646250606.

It is not an unprimeable number, because it can be changed into a prime (646950641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192346 + ... + 195676.

It is an arithmetic number, because the mean of its divisors is an integer number (81477396).

Almost surely, 2^646250641 is an apocalyptic number.

It is an amenable number.

646250641 is a deficient number, since it is larger than the sum of its proper divisors (5568527).

646250641 is a wasteful number, since it uses less digits than its factorization.

646250641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4943.

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

The square root of 646250641 is about 25421.4602452338. The cubic root of 646250641 is about 864.5703329019.

The spelling of 646250641 in words is "six hundred forty-six million, two hundred fifty thousand, six hundred forty-one".