8616644485 has 4 divisors (see below), whose sum is σ = 10339973388. Its totient is φ = 6893315584.

The previous prime is 8616644461. The next prime is 8616644489. The reversal of 8616644485 is 5844466168.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3026540196 + 5590104289 = 55014^2 + 74767^2 .

It is a cyclic number.

It is not a de Polignac number, because 8616644485 - 2⁵ = 8616644453 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 (8616644489) 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, 861664444 + ... + 861664453.

It is an arithmetic number, because the mean of its divisors is an integer number (2584993347).

Almost surely, 2^8616644485 is an apocalyptic number.

It is an amenable number.

8616644485 is a deficient number, since it is larger than the sum of its proper divisors (1723328903).

8616644485 is a wasteful number, since it uses less digits than its factorization.

8616644485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1723328902.

The product of its digits is 4423680, while the sum is 52.

The square root of 8616644485 is about 92825.8826244060. The cubic root of 8616644485 is about 2050.1205152232.

The spelling of 8616644485 in words is "eight billion, six hundred sixteen million, six hundred forty-four thousand, four hundred eighty-five".