63668844068773 has 4 divisors (see below), whose sum is σ = 63669110445388. Its totient is φ = 63668577692160.

The previous prime is 63668844068761. The next prime is 63668844068827. The reversal of 63668844068773 is 37786044886636.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27715412998849 + 35953431069924 = 5264543^2 + 5996118^2 .

It is a cyclic number.

It is not a de Polignac number, because 63668844068773 - 2¹³ = 63668844060581 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 63668844068773.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63668844038773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132829458 + ... + 133307923.

It is an arithmetic number, because the mean of its divisors is an integer number (15917277611347).

Almost surely, 2^{63668844068773} is an apocalyptic number.

It is an amenable number.

63668844068773 is a deficient number, since it is larger than the sum of its proper divisors (266376615).

63668844068773 is a wasteful number, since it uses less digits than its factorization.

63668844068773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266376614.

The product of its (nonzero) digits is 4682022912, while the sum is 76.

The spelling of 63668844068773 in words is "sixty-three trillion, six hundred sixty-eight billion, eight hundred forty-four million, sixty-eight thousand, seven hundred seventy-three".