646504416635 has 16 divisors (see below), whose sum is σ = 967237777152. Its totient is φ = 403015740000.

The previous prime is 646504416601. The next prime is 646504416647. The reversal of 646504416635 is 536614405646.

646504416635 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 646504416635 - 2¹⁰ = 646504415611 is a prime.

It is a Duffinian 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, 839615741 + ... + 839616510.

It is an arithmetic number, because the mean of its divisors is an integer number (60452361072).

Almost surely, 2^646504416635 is an apocalyptic number.

646504416635 is a deficient number, since it is larger than the sum of its proper divisors (320733360517).

646504416635 is a wasteful number, since it uses less digits than its factorization.

646504416635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1679232274.

The product of its (nonzero) digits is 6220800, while the sum is 50.

The spelling of 646504416635 in words is "six hundred forty-six billion, five hundred four million, four hundred sixteen thousand, six hundred thirty-five".