8626536521 has 4 divisors (see below), whose sum is σ = 8658605700. Its totient is φ = 8594467344.

The previous prime is 8626536517. The next prime is 8626536539. The reversal of 8626536521 is 1256356268.

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 1929405625 + 6697130896 = 43925^2 + 81836^2 .

It is a cyclic number.

It is not a de Polignac number, because 8626536521 - 2² = 8626536517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8626536511) 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, 16034186 + ... + 16034723.

It is an arithmetic number, because the mean of its divisors is an integer number (2164651425).

Almost surely, 2^8626536521 is an apocalyptic number.

It is an amenable number.

8626536521 is a deficient number, since it is larger than the sum of its proper divisors (32069179).

8626536521 is a wasteful number, since it uses less digits than its factorization.

8626536521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32069178.

The product of its digits is 518400, while the sum is 44.

The square root of 8626536521 is about 92879.1500876273. The cubic root of 8626536521 is about 2050.9047381456.

The spelling of 8626536521 in words is "eight billion, six hundred twenty-six million, five hundred thirty-six thousand, five hundred twenty-one".