646345543646 has 8 divisors (see below), whose sum is σ = 1057656344184. Its totient is φ = 293793428920.

The previous prime is 646345543601. The next prime is 646345543651.

646345543646 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 646345543591 and 646345543600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14689671425 + ... + 14689671468.

It is an arithmetic number, because the mean of its divisors is an integer number (132207043023).

Almost surely, 2^646345543646 is an apocalyptic number.

646345543646 is a deficient number, since it is larger than the sum of its proper divisors (411310800538).

646345543646 is a wasteful number, since it uses less digits than its factorization.

646345543646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29379342906.

The product of its digits is 74649600, while the sum is 56.

The spelling of 646345543646 in words is "six hundred forty-six billion, three hundred forty-five million, five hundred forty-three thousand, six hundred forty-six".