63887568841 has 4 divisors (see below), whose sum is σ = 63888920212. Its totient is φ = 63886217472.

The previous prime is 63887568839. The next prime is 63887568847. The reversal of 63887568841 is 14886578836.

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 55305399241 + 8582169600 = 235171^2 + 92640^2 .

It is a cyclic number.

It is not a de Polignac number, because 63887568841 - 2¹ = 63887568839 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63887568847) 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, 602100 + ... + 700213.

It is an arithmetic number, because the mean of its divisors is an integer number (15972230053).

Almost surely, 2^63887568841 is an apocalyptic number.

It is an amenable number.

63887568841 is a deficient number, since it is larger than the sum of its proper divisors (1351371).

63887568841 is a wasteful number, since it uses less digits than its factorization.

63887568841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1351370.

The product of its digits is 61931520, while the sum is 64.

The spelling of 63887568841 in words is "sixty-three billion, eight hundred eighty-seven million, five hundred sixty-eight thousand, eight hundred forty-one".