8636421671 has 16 divisors (see below), whose sum is σ = 9321510240. Its totient is φ = 7974766080.

The previous prime is 8636421649. The next prime is 8636421679. The reversal of 8636421671 is 1761246368.

It is a cyclic number.

It is not a de Polignac number, because 8636421671 - 2²² = 8632227367 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 (8636421679) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 924701 + ... + 933993.

It is an arithmetic number, because the mean of its divisors is an integer number (582594390).

Almost surely, 2^8636421671 is an apocalyptic number.

8636421671 is a deficient number, since it is larger than the sum of its proper divisors (685088569).

8636421671 is a wasteful number, since it uses less digits than its factorization.

8636421671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10546.

The product of its digits is 290304, while the sum is 44.

The square root of 8636421671 is about 92932.3499702875. The cubic root of 8636421671 is about 2051.6878165010.

The spelling of 8636421671 in words is "eight billion, six hundred thirty-six million, four hundred twenty-one thousand, six hundred seventy-one".