8607599909921 has 4 divisors (see below), whose sum is σ = 8609053165872. Its totient is φ = 8606146653972.

The previous prime is 8607599909891. The next prime is 8607599909927. The reversal of 8607599909921 is 1299099957068.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8607599909921 - 2²⁶ = 8607532801057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8607599909927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 726619091 + ... + 726630936.

It is an arithmetic number, because the mean of its divisors is an integer number (2152263291468).

Almost surely, 2^{8607599909921} is an apocalyptic number.

It is an amenable number.

8607599909921 is a deficient number, since it is larger than the sum of its proper divisors (1453255951).

8607599909921 is a wasteful number, since it uses less digits than its factorization.

8607599909921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1453255950.

The product of its (nonzero) digits is 198404640, while the sum is 74.

The spelling of 8607599909921 in words is "eight trillion, six hundred seven billion, five hundred ninety-nine million, nine hundred nine thousand, nine hundred twenty-one".