8716671643 has 4 divisors (see below), whose sum is σ = 8717785840. Its totient is φ = 8715557448.

The previous prime is 8716671637. The next prime is 8716671661. The reversal of 8716671643 is 3461766178.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8716671643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8716671673) 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, 545280 + ... + 561037.

It is an arithmetic number, because the mean of its divisors is an integer number (2179446460).

Almost surely, 2^8716671643 is an apocalyptic number.

8716671643 is a deficient number, since it is larger than the sum of its proper divisors (1114197).

8716671643 is a wasteful number, since it uses less digits than its factorization.

8716671643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1114196.

The product of its digits is 1016064, while the sum is 49.

The square root of 8716671643 is about 93363.1171448340. The cubic root of 8716671643 is about 2058.0230226357.

The spelling of 8716671643 in words is "eight billion, seven hundred sixteen million, six hundred seventy-one thousand, six hundred forty-three".