8321374557 has 12 divisors (see below), whose sum is σ = 12726808380. Its totient is φ = 5221254528.

The previous prime is 8321374553. The next prime is 8321374559. The reversal of 8321374557 is 7554731238.

8321374557 is a `hidden beast` number, since 8 + 3 + 21 + 3 + 74 + 557 = 666.

8321374557 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 5028795396 + 3292579161 = 70914^2 + 57381^2 .

It is not a de Polignac number, because 8321374557 - 2² = 8321374553 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8321374553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27193882 + ... + 27194187.

It is an arithmetic number, because the mean of its divisors is an integer number (1060567365).

Almost surely, 2^8321374557 is an apocalyptic number.

It is an amenable number.

8321374557 is a deficient number, since it is larger than the sum of its proper divisors (4405433823).

8321374557 is a wasteful number, since it uses less digits than its factorization.

8321374557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54388092 (or 54388089 counting only the distinct ones).

The product of its digits is 705600, while the sum is 45.

The square root of 8321374557 is about 91221.5684857479. The cubic root of 8321374557 is about 2026.4303916679.

The spelling of 8321374557 in words is "eight billion, three hundred twenty-one million, three hundred seventy-four thousand, five hundred fifty-seven".