16565028479 has 4 divisors (see below), whose sum is σ = 16569815376. Its totient is φ = 16560241584.

The previous prime is 16565028461. The next prime is 16565028509. The reversal of 16565028479 is 97482056561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97482056561 = 61 ⋅1598066501.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16565028479 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 16565028479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16565028409) 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, 2388254 + ... + 2395179.

It is an arithmetic number, because the mean of its divisors is an integer number (4142453844).

Almost surely, 2^16565028479 is an apocalyptic number.

16565028479 is a deficient number, since it is larger than the sum of its proper divisors (4786897).

16565028479 is an equidigital number, since it uses as much as digits as its factorization.

16565028479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4786896.

The product of its (nonzero) digits is 3628800, while the sum is 53.

The spelling of 16565028479 in words is "sixteen billion, five hundred sixty-five million, twenty-eight thousand, four hundred seventy-nine".