63318113821 has 4 divisors (see below), whose sum is σ = 63318887100. Its totient is φ = 63317340544.

The previous prime is 63318113797. The next prime is 63318113857. The reversal of 63318113821 is 12831181336.

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 52253388100 + 11064725721 = 228590^2 + 105189^2 .

It is a cyclic number.

It is not a de Polignac number, because 63318113821 - 2²¹ = 63316016669 is a prime.

It is a super-2 number, since 2×63318113821² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63318113321) 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, 247006 + ... + 433183.

It is an arithmetic number, because the mean of its divisors is an integer number (15829721775).

Almost surely, 2^63318113821 is an apocalyptic number.

It is an amenable number.

63318113821 is a deficient number, since it is larger than the sum of its proper divisors (773279).

63318113821 is an equidigital number, since it uses as much as digits as its factorization.

63318113821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773278.

The product of its digits is 20736, while the sum is 37.

The spelling of 63318113821 in words is "sixty-three billion, three hundred eighteen million, one hundred thirteen thousand, eight hundred twenty-one".