8640438511 has 8 divisors (see below), whose sum is σ = 8686548000. Its totient is φ = 8594356320.

The previous prime is 8640438467. The next prime is 8640438607. The reversal of 8640438511 is 1158340468.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8640438511 - 2⁷ = 8640438383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8640438011) 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 7 ways as a sum of consecutive naturals, for example, 1066785 + ... + 1074853.

It is an arithmetic number, because the mean of its divisors is an integer number (1085818500).

Almost surely, 2^8640438511 is an apocalyptic number.

8640438511 is a deficient number, since it is larger than the sum of its proper divisors (46109489).

8640438511 is a wasteful number, since it uses less digits than its factorization.

8640438511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13649.

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 8640438511 is about 92953.9590926605. The cubic root of 8640438511 is about 2052.0058503906.

Adding to 8640438511 its reverse (1158340468), we get a palindrome (9798778979).

The spelling of 8640438511 in words is "eight billion, six hundred forty million, four hundred thirty-eight thousand, five hundred eleven".