646332664430 has 16 divisors (see below), whose sum is σ = 1194842007360. Its totient is φ = 251545685472.

The previous prime is 646332664429. The next prime is 646332664463. The reversal of 646332664430 is 34466233646.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 873422150 + ... + 873422889.

It is an arithmetic number, because the mean of its divisors is an integer number (74677625460).

Almost surely, 2^646332664430 is an apocalyptic number.

646332664430 is a deficient number, since it is larger than the sum of its proper divisors (548509342930).

646332664430 is a wasteful number, since it uses less digits than its factorization.

646332664430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1746845083.

The product of its (nonzero) digits is 4478976, while the sum is 47.

The spelling of 646332664430 in words is "six hundred forty-six billion, three hundred thirty-two million, six hundred sixty-four thousand, four hundred thirty".