646131623613 has 64 divisors (see below), whose sum is σ = 1027669192704. Its totient is φ = 353449152000.

The previous prime is 646131623611. The next prime is 646131623653. The reversal of 646131623613 is 316326131646.

646131623613 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 646131623613 - 2¹ = 646131623611 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646131623611) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12873595 + ... + 12923687.

It is an arithmetic number, because the mean of its divisors is an integer number (16057331136).

Almost surely, 2^646131623613 is an apocalyptic number.

It is an amenable number.

646131623613 is a deficient number, since it is larger than the sum of its proper divisors (381537569091).

646131623613 is a wasteful number, since it uses less digits than its factorization.

646131623613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50426.

The product of its digits is 279936, while the sum is 42.

The spelling of 646131623613 in words is "six hundred forty-six billion, one hundred thirty-one million, six hundred twenty-three thousand, six hundred thirteen".