646244242000261 has 8 divisors (see below), whose sum is σ = 680619128331200. Its totient is φ = 611905558818240.

The previous prime is 646244242000219. The next prime is 646244242000271. The reversal of 646244242000261 is 162000242442646.

646244242000261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 646244242000261 - 2¹¹ = 646244241998213 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 (646244242000271) 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, 9050750580 + ... + 9050821981.

It is an arithmetic number, because the mean of its divisors is an integer number (85077391041400).

Almost surely, 2^{646244242000261} is an apocalyptic number.

It is an amenable number.

646244242000261 is a deficient number, since it is larger than the sum of its proper divisors (34374886330939).

646244242000261 is a wasteful number, since it uses less digits than its factorization.

646244242000261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18101574459.

The product of its (nonzero) digits is 884736, while the sum is 43.

The spelling of 646244242000261 in words is "six hundred forty-six trillion, two hundred forty-four billion, two hundred forty-two million, two hundred sixty-one", and thus it is an aban number.