16221360875 has 8 divisors (see below), whose sum is σ = 20244258528. Its totient is φ = 12977088600.

The previous prime is 16221360871. The next prime is 16221360887. The reversal of 16221360875 is 57806312261.

It is not a de Polignac number, because 16221360875 - 2² = 16221360871 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16221360871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64885319 + ... + 64885568.

It is an arithmetic number, because the mean of its divisors is an integer number (2530532316).

Almost surely, 2^16221360875 is an apocalyptic number.

16221360875 is a deficient number, since it is larger than the sum of its proper divisors (4022897653).

16221360875 is an equidigital number, since it uses as much as digits as its factorization.

16221360875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129770902 (or 129770892 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 41.

The spelling of 16221360875 in words is "sixteen billion, two hundred twenty-one million, three hundred sixty thousand, eight hundred seventy-five".