16565504560431 has 16 divisors (see below), whose sum is σ = 22292541744000. Its totient is φ = 10941091871328.

The previous prime is 16565504560417. The next prime is 16565504560453. The reversal of 16565504560431 is 13406540556561.

It is not a de Polignac number, because 16565504560431 - 2¹⁹ = 16565504036143 is a prime.

It is a super-2 number, since 2×16565504560431² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16565504560331) 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 15 ways as a sum of consecutive naturals, for example, 67201 + ... + 5756346.

It is an arithmetic number, because the mean of its divisors is an integer number (1393283859000).

Almost surely, 2^{16565504560431} is an apocalyptic number.

16565504560431 is a deficient number, since it is larger than the sum of its proper divisors (5727037183569).

16565504560431 is a wasteful number, since it uses less digits than its factorization.

16565504560431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5832358.

The product of its (nonzero) digits is 6480000, while the sum is 51.

The spelling of 16565504560431 in words is "sixteen trillion, five hundred sixty-five billion, five hundred four million, five hundred sixty thousand, four hundred thirty-one".