6398888888936 has 8 divisors (see below), whose sum is σ = 11997916666770. Its totient is φ = 3199444444464.

The previous prime is 6398888888933. The next prime is 6398888888963.

It is a happy number.

6398888888936 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 6141326548900 + 257562340036 = 2478170^2 + 507506^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (6398888888933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 399930555551 + ... + 399930555566.

Almost surely, 2^{6398888888936} is an apocalyptic number.

It is an amenable number.

6398888888936 is a deficient number, since it is larger than the sum of its proper divisors (5599027777834).

6398888888936 is a wasteful number, since it uses less digits than its factorization.

6398888888936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799861111123 (or 799861111119 counting only the distinct ones).

The product of its digits is 55037657088, while the sum is 92.

The spelling of 6398888888936 in words is "six trillion, three hundred ninety-eight billion, eight hundred eighty-eight million, eight hundred eighty-eight thousand, nine hundred thirty-six".