646225464522646 has 16 divisors (see below), whose sum is σ = 978746545944720. Its totient is φ = 319988209651200.

The previous prime is 646225464522629. The next prime is 646225464522661.

It is a happy number.

646225464522646 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, 2898332451 + ... + 2898555406.

It is an arithmetic number, because the mean of its divisors is an integer number (61171659121545).

Almost surely, 2^{646225464522646} is an apocalyptic number.

646225464522646 is a deficient number, since it is larger than the sum of its proper divisors (332521081422074).

646225464522646 is a wasteful number, since it uses less digits than its factorization.

646225464522646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5796888399.

The product of its digits is 796262400, while the sum is 64.

The spelling of 646225464522646 in words is "six hundred forty-six trillion, two hundred twenty-five billion, four hundred sixty-four million, five hundred twenty-two thousand, six hundred forty-six".