18327515481745 has 16 divisors (see below), whose sum is σ = 23295444196608. Its totient is φ = 13794374465280.

The previous prime is 18327515481727. The next prime is 18327515481827. The reversal of 18327515481745 is 54718451572381.

It is a de Polignac number, because none of the positive numbers 2^k-18327515481745 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40135719 + ... + 40589788.

It is an arithmetic number, because the mean of its divisors is an integer number (1455965262288).

Almost surely, 2^{18327515481745} is an apocalyptic number.

It is an amenable number.

18327515481745 is a deficient number, since it is larger than the sum of its proper divisors (4967928714863).

18327515481745 is a wasteful number, since it uses less digits than its factorization.

18327515481745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80728200.

The product of its digits is 37632000, while the sum is 61.

The spelling of 18327515481745 in words is "eighteen trillion, three hundred twenty-seven billion, five hundred fifteen million, four hundred eighty-one thousand, seven hundred forty-five".