8313621784 has 16 divisors (see below), whose sum is σ = 16787121120. Its totient is φ = 3837056160.

The previous prime is 8313621739. The next prime is 8313621847. The reversal of 8313621784 is 4871263138.

It is a self number, because there is not a number n which added to its sum of digits gives 8313621784.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 39969232 + ... + 39969439.

It is an arithmetic number, because the mean of its divisors is an integer number (1049195070).

Almost surely, 2^8313621784 is an apocalyptic number.

It is an amenable number.

8313621784 is an abundant number, since it is smaller than the sum of its proper divisors (8473499336).

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

8313621784 is a wasteful number, since it uses less digits than its factorization.

8313621784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79938690 (or 79938686 counting only the distinct ones).

The product of its digits is 193536, while the sum is 43.

The square root of 8313621784 is about 91179.0643952876. The cubic root of 8313621784 is about 2025.8008748242.

The spelling of 8313621784 in words is "eight billion, three hundred thirteen million, six hundred twenty-one thousand, seven hundred eighty-four".