646463466613 has 4 divisors (see below), whose sum is σ = 651398302368. Its totient is φ = 641528630860.

The previous prime is 646463466611. The next prime is 646463466617. The reversal of 646463466613 is 316664364646.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 646463466613 - 2¹ = 646463466611 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646463466611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2467417681 + ... + 2467417942.

It is an arithmetic number, because the mean of its divisors is an integer number (162849575592).

Almost surely, 2^646463466613 is an apocalyptic number.

It is an amenable number.

646463466613 is a deficient number, since it is larger than the sum of its proper divisors (4934835755).

646463466613 is a wasteful number, since it uses less digits than its factorization.

646463466613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4934835754.

The product of its digits is 26873856, while the sum is 55.

The spelling of 646463466613 in words is "six hundred forty-six billion, four hundred sixty-three million, four hundred sixty-six thousand, six hundred thirteen".