8649432327881 has 4 divisors (see below), whose sum is σ = 8650921817472. Its totient is φ = 8647942838292.

The previous prime is 8649432327839. The next prime is 8649432327917. The reversal of 8649432327881 is 1887232349468.

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 a de Polignac number, because none of the positive numbers 2^k-8649432327881 is a prime.

It is a super-2 number, since 2×8649432327881² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8649432327281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 744736085 + ... + 744747698.

It is an arithmetic number, because the mean of its divisors is an integer number (2162730454368).

Almost surely, 2^{8649432327881} is an apocalyptic number.

It is an amenable number.

8649432327881 is a deficient number, since it is larger than the sum of its proper divisors (1489489591).

8649432327881 is a wasteful number, since it uses less digits than its factorization.

8649432327881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1489489590.

The product of its digits is 111476736, while the sum is 65.

Multiplying 8649432327881 by its sum of digits (65), we get a palindrome (562213101312265).

The spelling of 8649432327881 in words is "eight trillion, six hundred forty-nine billion, four hundred thirty-two million, three hundred twenty-seven thousand, eight hundred eighty-one".