8638198544 has 20 divisors (see below), whose sum is σ = 16775354880. Its totient is φ = 4309074720.

The previous prime is 8638198511. The next prime is 8638198603. The reversal of 8638198544 is 4458918368.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 8638198544.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 619424 + ... + 633215.

It is an arithmetic number, because the mean of its divisors is an integer number (838767744).

Almost surely, 2^8638198544 is an apocalyptic number.

It is an amenable number.

8638198544 is a deficient number, since it is larger than the sum of its proper divisors (8137156336).

8638198544 is a wasteful number, since it uses less digits than its factorization.

8638198544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253078 (or 1253072 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 56.

The square root of 8638198544 is about 92941.9095134160. The cubic root of 8638198544 is about 2051.8285128386.

The spelling of 8638198544 in words is "eight billion, six hundred thirty-eight million, one hundred ninety-eight thousand, five hundred forty-four".