646225522646 has 16 divisors (see below), whose sum is σ = 1119663473040. Its totient is φ = 276460116480.

The previous prime is 646225522643. The next prime is 646225522669.

646225522646 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×646225522646² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 646225522594 and 646225522603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646225522643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 863937491 + ... + 863938238.

It is an arithmetic number, because the mean of its divisors is an integer number (69978967065).

Almost surely, 2^646225522646 is an apocalyptic number.

646225522646 is a deficient number, since it is larger than the sum of its proper divisors (473437950394).

646225522646 is a wasteful number, since it uses less digits than its factorization.

646225522646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1727875759.

The product of its digits is 8294400, while the sum is 50.

The spelling of 646225522646 in words is "six hundred forty-six billion, two hundred twenty-five million, five hundred twenty-two thousand, six hundred forty-six".