646110405643 has 16 divisors (see below), whose sum is σ = 662330179584. Its totient is φ = 630079097760.

The previous prime is 646110405623. The next prime is 646110405679. The reversal of 646110405643 is 346504011646.

It is a happy number.

646110405643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-646110405643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 646110405596 and 646110405605.

It is not an unprimeable number, because it can be changed into a prime (646110405623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11491746 + ... + 11547832.

It is an arithmetic number, because the mean of its divisors is an integer number (41395636224).

Almost surely, 2^646110405643 is an apocalyptic number.

646110405643 is a deficient number, since it is larger than the sum of its proper divisors (16219773941).

646110405643 is a wasteful number, since it uses less digits than its factorization.

646110405643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57762.

The product of its (nonzero) digits is 207360, while the sum is 40.

The spelling of 646110405643 in words is "six hundred forty-six billion, one hundred ten million, four hundred five thousand, six hundred forty-three".