646673713 has 16 divisors (see below), whose sum is σ = 748933120. Its totient is φ = 546932736.

The previous prime is 646673641. The next prime is 646673719. The reversal of 646673713 is 317376646.

646673713 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 646673713 - 2²¹ = 644576561 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 646673713.

It is not an unprimeable number, because it can be changed into a prime (646673719) 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, 169693 + ... + 173461.

It is an arithmetic number, because the mean of its divisors is an integer number (46808320).

Almost surely, 2^646673713 is an apocalyptic number.

It is an amenable number.

646673713 is a deficient number, since it is larger than the sum of its proper divisors (102259407).

646673713 is a wasteful number, since it uses less digits than its factorization.

646673713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4096.

The product of its digits is 381024, while the sum is 43.

The square root of 646673713 is about 25429.7800423047. The cubic root of 646673713 is about 864.7589571944.

The spelling of 646673713 in words is "six hundred forty-six million, six hundred seventy-three thousand, seven hundred thirteen".