646063043645 has 16 divisors (see below), whose sum is σ = 776826547200. Its totient is φ = 515817080064.

The previous prime is 646063043603. The next prime is 646063043677. The reversal of 646063043645 is 546340360646.

It is a cyclic number.

It is not a de Polignac number, because 646063043645 - 2¹⁰ = 646063042621 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 646063043645.

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, 9451109 + ... + 9519221.

It is an arithmetic number, because the mean of its divisors is an integer number (48551659200).

Almost surely, 2^646063043645 is an apocalyptic number.

It is an amenable number.

646063043645 is a deficient number, since it is larger than the sum of its proper divisors (130763503555).

646063043645 is a wasteful number, since it uses less digits than its factorization.

646063043645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71884.

The product of its (nonzero) digits is 3732480, while the sum is 47.

The spelling of 646063043645 in words is "six hundred forty-six billion, sixty-three million, forty-three thousand, six hundred forty-five".