8644521513 has 8 divisors (see below), whose sum is σ = 11544012576. Its totient is φ = 5754022400.

The previous prime is 8644521497. The next prime is 8644521541. The reversal of 8644521513 is 3151254468.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8644521513 - 2⁴ = 8644521497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8644721513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2245743 + ... + 2249588.

It is an arithmetic number, because the mean of its divisors is an integer number (1443001572).

Almost surely, 2^8644521513 is an apocalyptic number.

It is an amenable number.

8644521513 is a deficient number, since it is larger than the sum of its proper divisors (2899491063).

8644521513 is a wasteful number, since it uses less digits than its factorization.

8644521513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4495975.

The product of its digits is 115200, while the sum is 39.

The square root of 8644521513 is about 92975.9189951893. The cubic root of 8644521513 is about 2052.3290216668.

The spelling of 8644521513 in words is "eight billion, six hundred forty-four million, five hundred twenty-one thousand, five hundred thirteen".