63818768 has 20 divisors (see below), whose sum is σ = 133160748. Its totient is φ = 29454720.

The previous prime is 63818761. The next prime is 63818771. The reversal of 63818768 is 86781836.

It can be written as a sum of positive squares in 2 ways, for example, as 25725184 + 38093584 = 5072^2 + 6172^2 .

It is not an unprimeable number, because it can be changed into a prime (63818761) 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, 153203 + ... + 153618.

Almost surely, 2^63818768 is an apocalyptic number.

It is an amenable number.

63818768 is an abundant number, since it is smaller than the sum of its proper divisors (69341980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63818768 is a wasteful number, since it uses less digits than its factorization.

63818768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306842 (or 306836 counting only the distinct ones).

The product of its digits is 387072, while the sum is 47.

The square root of 63818768 is about 7988.6649698182. The cubic root of 63818768 is about 399.6220763801.

The spelling of 63818768 in words is "sixty-three million, eight hundred eighteen thousand, seven hundred sixty-eight".