8436581868 has 48 divisors (see below), whose sum is σ = 23126858496. Its totient is φ = 2359882560.

The previous prime is 8436581821. The next prime is 8436581941. The reversal of 8436581868 is 8681856348.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2456496 + ... + 2459927.

It is an arithmetic number, because the mean of its divisors is an integer number (481809552).

Almost surely, 2^8436581868 is an apocalyptic number.

It is an amenable number.

8436581868 is an abundant number, since it is smaller than the sum of its proper divisors (14690276628).

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

8436581868 is a wasteful number, since it uses less digits than its factorization.

8436581868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4916454 (or 4916452 counting only the distinct ones).

The product of its digits is 8847360, while the sum is 57.

The square root of 8436581868 is about 91850.8675408131. The cubic root of 8436581868 is about 2035.7393669920.

The spelling of 8436581868 in words is "eight billion, four hundred thirty-six million, five hundred eighty-one thousand, eight hundred sixty-eight".