8656940871 has 12 divisors (see below), whose sum is σ = 12740404248. Its totient is φ = 5662401264.

The previous prime is 8656940869. The next prime is 8656940879. The reversal of 8656940871 is 1780496568.

8656940871 is a `hidden beast` number, since 8 + 6 + 569 + 4 + 0 + 8 + 71 = 666.

It is not a de Polignac number, because 8656940871 - 2¹ = 8656940869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8656940879) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9073885 + ... + 9074838.

It is an arithmetic number, because the mean of its divisors is an integer number (1061700354).

Almost surely, 2^8656940871 is an apocalyptic number.

8656940871 is a deficient number, since it is larger than the sum of its proper divisors (4083463377).

8656940871 is a wasteful number, since it uses less digits than its factorization.

8656940871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18148782 (or 18148779 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The square root of 8656940871 is about 93042.6830599806. The cubic root of 8656940871 is about 2053.3113938461.

The spelling of 8656940871 in words is "eight billion, six hundred fifty-six million, nine hundred forty thousand, eight hundred seventy-one".