16522975999 has 4 divisors (see below), whose sum is σ = 16793844520. Its totient is φ = 16252107480.

The previous prime is 16522975991. The next prime is 16522976021. The reversal of 16522975999 is 99957922561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16522975999 - 2³ = 16522975991 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16522975999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16522975991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135434169 + ... + 135434290.

It is an arithmetic number, because the mean of its divisors is an integer number (4198461130).

Almost surely, 2^16522975999 is an apocalyptic number.

16522975999 is a deficient number, since it is larger than the sum of its proper divisors (270868521).

16522975999 is an equidigital number, since it uses as much as digits as its factorization.

16522975999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270868520.

The product of its digits is 27556200, while the sum is 64.

The spelling of 16522975999 in words is "sixteen billion, five hundred twenty-two million, nine hundred seventy-five thousand, nine hundred ninety-nine".