8679440581 has 4 divisors (see below), whose sum is σ = 9919360672. Its totient is φ = 7439520492.

The previous prime is 8679440573. The next prime is 8679440587. The reversal of 8679440581 is 1850449768.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8679440581 - 2³ = 8679440573 is a prime.

It is a super-2 number, since 2×8679440581² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8679440587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 619960035 + ... + 619960048.

It is an arithmetic number, because the mean of its divisors is an integer number (2479840168).

Almost surely, 2^8679440581 is an apocalyptic number.

It is an amenable number.

8679440581 is a deficient number, since it is larger than the sum of its proper divisors (1239920091).

8679440581 is a wasteful number, since it uses less digits than its factorization.

8679440581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1239920090.

The product of its (nonzero) digits is 1935360, while the sum is 52.

The square root of 8679440581 is about 93163.5152889799. The cubic root of 8679440581 is about 2055.0887324023.

The spelling of 8679440581 in words is "eight billion, six hundred seventy-nine million, four hundred forty thousand, five hundred eighty-one".