16418645525563 has 4 divisors (see below), whose sum is σ = 16422078239008. Its totient is φ = 16415212812120.

The previous prime is 16418645525519. The next prime is 16418645525567. The reversal of 16418645525563 is 36552554681461.

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 16418645525563 - 2¹³ = 16418645517371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16418645525567) 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 3 ways as a sum of consecutive naturals, for example, 1716349548 + ... + 1716359113.

It is an arithmetic number, because the mean of its divisors is an integer number (4105519559752).

Almost surely, 2^{16418645525563} is an apocalyptic number.

16418645525563 is a deficient number, since it is larger than the sum of its proper divisors (3432713445).

16418645525563 is an equidigital number, since it uses as much as digits as its factorization.

16418645525563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3432713444.

The product of its digits is 103680000, while the sum is 61.

The spelling of 16418645525563 in words is "sixteen trillion, four hundred eighteen billion, six hundred forty-five million, five hundred twenty-five thousand, five hundred sixty-three".