646344255201 has 8 divisors (see below), whose sum is σ = 861873999360. Its totient is φ = 430855340592.

The previous prime is 646344255157. The next prime is 646344255203. The reversal of 646344255201 is 102552443646.

It is a happy number.

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

It is not a de Polignac number, because 646344255201 - 2¹⁰ = 646344254177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (646344255203) 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, 10170430 + ... + 10233783.

It is an arithmetic number, because the mean of its divisors is an integer number (107734249920).

Almost surely, 2^646344255201 is an apocalyptic number.

It is an amenable number.

646344255201 is a deficient number, since it is larger than the sum of its proper divisors (215529744159).

646344255201 is a wasteful number, since it uses less digits than its factorization.

646344255201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20414775.

The product of its (nonzero) digits is 691200, while the sum is 42.

Adding to 646344255201 its reverse (102552443646), we get a palindrome (748896698847).

The spelling of 646344255201 in words is "six hundred forty-six billion, three hundred forty-four million, two hundred fifty-five thousand, two hundred one".