8648639971 has 8 divisors (see below), whose sum is σ = 8673714000. Its totient is φ = 8623585920.

The previous prime is 8648639957. The next prime is 8648640017. The reversal of 8648639971 is 1799368468.

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 8648639971 - 2⁵ = 8648639939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8648639941) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1407576 + ... + 1413706.

It is an arithmetic number, because the mean of its divisors is an integer number (1084214250).

Almost surely, 2^8648639971 is an apocalyptic number.

8648639971 is a deficient number, since it is larger than the sum of its proper divisors (25074029).

8648639971 is a wasteful number, since it uses less digits than its factorization.

8648639971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9989.

The product of its digits is 15676416, while the sum is 61.

The square root of 8648639971 is about 92998.0643400711. The cubic root of 8648639971 is about 2052.6548962262.

The spelling of 8648639971 in words is "eight billion, six hundred forty-eight million, six hundred thirty-nine thousand, nine hundred seventy-one".