18178454487089 has 16 divisors (see below), whose sum is σ = 19588560722304. Its totient is φ = 16770030480000.

The previous prime is 18178454487041. The next prime is 18178454487157. The reversal of 18178454487089 is 98078445487181.

It is a cyclic number.

It is not a de Polignac number, because 18178454487089 - 2³² = 18174159519793 is a prime.

It is a super-5 number, since 5×18178454487089⁵ (a number of 67 digits) contains 55555 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18178454487019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 317382524 + ... + 317439794.

It is an arithmetic number, because the mean of its divisors is an integer number (1224285045144).

Almost surely, 2^{18178454487089} is an apocalyptic number.

It is an amenable number.

18178454487089 is a deficient number, since it is larger than the sum of its proper divisors (1410106235215).

18178454487089 is a wasteful number, since it uses less digits than its factorization.

18178454487089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71528.

The product of its (nonzero) digits is 578027520, while the sum is 74.

The spelling of 18178454487089 in words is "eighteen trillion, one hundred seventy-eight billion, four hundred fifty-four million, four hundred eighty-seven thousand, eighty-nine".