643510264466313 has 12 divisors (see below), whose sum is σ = 929527839052228. Its totient is φ = 429000837161760.

The previous prime is 643510264466291. The next prime is 643510264466317. The reversal of 643510264466313 is 313664462015346.

643510264466313 is a `hidden beast` number, since 6 + 4 + 3 + 5 + 1 + 0 + 264 + 4 + 66 + 313 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 217931642450064 + 425578622016249 = 14762508^2 + 20629557^2 .

It is not a de Polignac number, because 643510264466313 - 2¹⁷ = 643510264335241 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 643510264466313.

It is not an unprimeable number, because it can be changed into a prime (643510264466317) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 499805998 + ... + 501091863.

Almost surely, 2^{643510264466313} is an apocalyptic number.

It is an amenable number.

643510264466313 is a deficient number, since it is larger than the sum of its proper divisors (286017574585915).

643510264466313 is a wasteful number, since it uses less digits than its factorization.

643510264466313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000969304 (or 1000969301 counting only the distinct ones).

The product of its (nonzero) digits is 22394880, while the sum is 54.

The spelling of 643510264466313 in words is "six hundred forty-three trillion, five hundred ten billion, two hundred sixty-four million, four hundred sixty-six thousand, three hundred thirteen".