8644412217 has 16 divisors (see below), whose sum is σ = 13597356032. Its totient is φ = 4780319760.

The previous prime is 8644412177. The next prime is 8644412221. The reversal of 8644412217 is 7122144468.

It is not a de Polignac number, because 8644412217 - 2⁸ = 8644411961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8644412267) 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, 6638683 + ... + 6639984.

It is an arithmetic number, because the mean of its divisors is an integer number (849834752).

Almost surely, 2^8644412217 is an apocalyptic number.

It is an amenable number.

8644412217 is a deficient number, since it is larger than the sum of its proper divisors (4952943815).

8644412217 is a wasteful number, since it uses less digits than its factorization.

8644412217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13278708.

The product of its digits is 86016, while the sum is 39.

The square root of 8644412217 is about 92975.3312282349. The cubic root of 8644412217 is about 2052.3203721694.

The spelling of 8644412217 in words is "eight billion, six hundred forty-four million, four hundred twelve thousand, two hundred seventeen".