646574343475646 has 16 divisors (see below), whose sum is σ = 1012035662899200. Its totient is φ = 309229296279288.

The previous prime is 646574343475637. The next prime is 646574343475651.

646574343475646 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, 35905826 + ... + 50817093.

It is an arithmetic number, because the mean of its divisors is an integer number (63252228931200).

Almost surely, 2^{646574343475646} is an apocalyptic number.

646574343475646 is a deficient number, since it is larger than the sum of its proper divisors (365461319423554).

646574343475646 is a wasteful number, since it uses less digits than its factorization.

646574343475646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86885023.

The product of its digits is 14631321600, while the sum is 74.

The spelling of 646574343475646 in words is "six hundred forty-six trillion, five hundred seventy-four billion, three hundred forty-three million, four hundred seventy-five thousand, six hundred forty-six".