8465680521 has 16 divisors (see below), whose sum is σ = 12554219200. Its totient is φ = 5638175424.

The previous prime is 8465680511. The next prime is 8465680543. The reversal of 8465680521 is 1250865648.

8465680521 is a `hidden beast` number, since 8 + 4 + 65 + 68 + 0 + 521 = 666.

It is not a de Polignac number, because 8465680521 - 2¹³ = 8465672329 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8465680511) 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 15 ways as a sum of consecutive naturals, for example, 128131 + ... + 182616.

It is an arithmetic number, because the mean of its divisors is an integer number (784638700).

Almost surely, 2^8465680521 is an apocalyptic number.

It is an amenable number.

8465680521 is a deficient number, since it is larger than the sum of its proper divisors (4088538679).

8465680521 is a wasteful number, since it uses less digits than its factorization.

8465680521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311765 (or 311759 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 45.

The square root of 8465680521 is about 92009.1328129985. The cubic root of 8465680521 is about 2038.0771739136.

The spelling of 8465680521 in words is "eight billion, four hundred sixty-five million, six hundred eighty thousand, five hundred twenty-one".