8672536521 has 48 divisors (see below), whose sum is σ = 14144090688. Its totient is φ = 5074790400.

The previous prime is 8672536517. The next prime is 8672536531. The reversal of 8672536521 is 1256352768.

8672536521 is a `hidden beast` number, since 8 + 6 + 72 + 53 + 6 + 521 = 666.

It is not a de Polignac number, because 8672536521 - 2² = 8672536517 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8672536531) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 382710 + ... + 404736.

It is an arithmetic number, because the mean of its divisors is an integer number (294668556).

Almost surely, 2^8672536521 is an apocalyptic number.

It is an amenable number.

8672536521 is a deficient number, since it is larger than the sum of its proper divisors (5471554167).

8672536521 is a wasteful number, since it uses less digits than its factorization.

8672536521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22182 (or 22179 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 8672536521 is about 93126.4544638096. The cubic root of 8672536521 is about 2054.5436811587.

The spelling of 8672536521 in words is "eight billion, six hundred seventy-two million, five hundred thirty-six thousand, five hundred twenty-one".