818213488181 has 16 divisors (see below), whose sum is σ = 884612366400. Its totient is φ = 754247894400.

The previous prime is 818213488171. The next prime is 818213488189. The reversal of 818213488181 is 181884312818.

It is not a de Polignac number, because 818213488181 - 2²² = 818209293877 is a prime.

It is a super-3 number, since 3×818213488181³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (818213488189) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1090430 + ... + 1680911.

It is an arithmetic number, because the mean of its divisors is an integer number (55288272900).

Almost surely, 2^818213488181 is an apocalyptic number.

It is an amenable number.

818213488181 is a deficient number, since it is larger than the sum of its proper divisors (66398878219).

818213488181 is a wasteful number, since it uses less digits than its factorization.

818213488181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2771780.

The product of its digits is 786432, while the sum is 53.

The spelling of 818213488181 in words is "eight hundred eighteen billion, two hundred thirteen million, four hundred eighty-eight thousand, one hundred eighty-one".