646332505233646 has 16 divisors (see below), whose sum is σ = 1208725724073600. Its totient is φ = 251817859181880.

The previous prime is 646332505233581. The next prime is 646332505233677.

646332505233646 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2098482159696 + ... + 2098482160003.

It is an arithmetic number, because the mean of its divisors is an integer number (75545357754600).

Almost surely, 2^{646332505233646} is an apocalyptic number.

646332505233646 is a deficient number, since it is larger than the sum of its proper divisors (562393218839954).

646332505233646 is a wasteful number, since it uses less digits than its factorization.

646332505233646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4196964319719.

The product of its (nonzero) digits is 167961600, while the sum is 58.

It can be divided in two parts, 64633250 and 5233646, that added together give a palindrome (69866896).

The spelling of 646332505233646 in words is "six hundred forty-six trillion, three hundred thirty-two billion, five hundred five million, two hundred thirty-three thousand, six hundred forty-six".