818543187845 has 16 divisors (see below), whose sum is σ = 1049751275328. Its totient is φ = 610554912000.

The previous prime is 818543187817. The next prime is 818543187863. The reversal of 818543187845 is 548781345818.

It is not a de Polignac number, because 818543187845 - 2²⁰ = 818542139269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44990531 + ... + 45008720.

It is an arithmetic number, because the mean of its divisors is an integer number (65609454708).

Almost surely, 2^818543187845 is an apocalyptic number.

818543187845 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

818543187845 is a deficient number, since it is larger than the sum of its proper divisors (231208087483).

818543187845 is a wasteful number, since it uses less digits than its factorization.

818543187845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89999380.

The product of its digits is 34406400, while the sum is 62.

The spelling of 818543187845 in words is "eight hundred eighteen billion, five hundred forty-three million, one hundred eighty-seven thousand, eight hundred forty-five".