16530440720875 has 16 divisors (see below), whose sum is σ = 20630143497600. Its totient is φ = 13224254193600.

The previous prime is 16530440720869. The next prime is 16530440720879. The reversal of 16530440720875 is 57802704403561.

It is not a de Polignac number, because 16530440720875 - 2⁹ = 16530440720363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16530440720879) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19669534 + ... + 20492716.

It is an arithmetic number, because the mean of its divisors is an integer number (1289383968600).

Almost surely, 2^{16530440720875} is an apocalyptic number.

16530440720875 is a deficient number, since it is larger than the sum of its proper divisors (4099702776725).

16530440720875 is an equidigital number, since it uses as much as digits as its factorization.

16530440720875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983847 (or 983837 counting only the distinct ones).

The product of its (nonzero) digits is 5644800, while the sum is 52.

The spelling of 16530440720875 in words is "sixteen trillion, five hundred thirty billion, four hundred forty million, seven hundred twenty thousand, eight hundred seventy-five".