16542247565803 has 4 divisors (see below), whose sum is σ = 16712786200600. Its totient is φ = 16371708931008.

The previous prime is 16542247565801. The next prime is 16542247565821. The reversal of 16542247565803 is 30856574224561.

It is a happy number.

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 16542247565803 - 2¹ = 16542247565801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16542247565801) 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, 85269317253 + ... + 85269317446.

It is an arithmetic number, because the mean of its divisors is an integer number (4178196550150).

Almost surely, 2^{16542247565803} is an apocalyptic number.

16542247565803 is a deficient number, since it is larger than the sum of its proper divisors (170538634797).

16542247565803 is an equidigital number, since it uses as much as digits as its factorization.

16542247565803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170538634796.

The product of its (nonzero) digits is 48384000, while the sum is 58.

The spelling of 16542247565803 in words is "sixteen trillion, five hundred forty-two billion, two hundred forty-seven million, five hundred sixty-five thousand, eight hundred three".