646434301426 has 4 divisors (see below), whose sum is σ = 969651452142. Its totient is φ = 323217150712.

The previous prime is 646434301367. The next prime is 646434301433. The reversal of 646434301426 is 624103434646.

646434301426 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 492311319201 + 154122982225 = 701649^2 + 392585^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161608575355 + ... + 161608575358.

Almost surely, 2^646434301426 is an apocalyptic number.

646434301426 is a deficient number, since it is larger than the sum of its proper divisors (323217150716).

646434301426 is a wasteful number, since it uses less digits than its factorization.

646434301426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323217150715.

The product of its (nonzero) digits is 995328, while the sum is 43.

The spelling of 646434301426 in words is "six hundred forty-six billion, four hundred thirty-four million, three hundred one thousand, four hundred twenty-six".