16565145542263 has 4 divisors (see below), whose sum is σ = 16565229533920. Its totient is φ = 16565061550608.

The previous prime is 16565145542227. The next prime is 16565145542293. The reversal of 16565145542263 is 36224554156561.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16565145542263 is a prime.

It is a super-2 number, since 2×16565145542263² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16565145542293) 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, 41699295 + ... + 42094672.

It is an arithmetic number, because the mean of its divisors is an integer number (4141307383480).

Almost surely, 2^{16565145542263} is an apocalyptic number.

16565145542263 is a deficient number, since it is larger than the sum of its proper divisors (83991657).

16565145542263 is an equidigital number, since it uses as much as digits as its factorization.

16565145542263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83991656.

The product of its digits is 25920000, while the sum is 55.

The spelling of 16565145542263 in words is "sixteen trillion, five hundred sixty-five billion, one hundred forty-five million, five hundred forty-two thousand, two hundred sixty-three".