646375573646 has 32 divisors (see below), whose sum is σ = 1119525563520. Its totient is φ = 276805706400.

The previous prime is 646375573633. The next prime is 646375573681.

646375573646 is nontrivially palindromic in base 10.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4196036 + ... + 4347351.

It is an arithmetic number, because the mean of its divisors is an integer number (34985173860).

Almost surely, 2^646375573646 is an apocalyptic number.

646375573646 is a deficient number, since it is larger than the sum of its proper divisors (473149989874).

646375573646 is a wasteful number, since it uses less digits than its factorization.

646375573646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8543600.

The product of its digits is 228614400, while the sum is 62.

The spelling of 646375573646 in words is "six hundred forty-six billion, three hundred seventy-five million, five hundred seventy-three thousand, six hundred forty-six".