6368688881 has 4 divisors (see below), whose sum is σ = 6369111552. Its totient is φ = 6368266212.

The previous prime is 6368688877. The next prime is 6368688917. The reversal of 6368688881 is 1888868636.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6368688881 - 2² = 6368688877 is a prime.

It is a super-2 number, since 2×6368688881² = 81120396125946064322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6368688181) 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, 187865 + ... + 219158.

It is an arithmetic number, because the mean of its divisors is an integer number (1592277888).

Almost surely, 2^6368688881 is an apocalyptic number.

It is an amenable number.

6368688881 is a deficient number, since it is larger than the sum of its proper divisors (422671).

6368688881 is a wasteful number, since it uses less digits than its factorization.

6368688881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422670.

The product of its digits is 21233664, while the sum is 62.

The square root of 6368688881 is about 79804.0655668619. The cubic root of 6368688881 is about 1853.6028043952.

The spelling of 6368688881 in words is "six billion, three hundred sixty-eight million, six hundred eighty-eight thousand, eight hundred eighty-one".