818255489133 has 4 divisors (see below), whose sum is σ = 1091007318848. Its totient is φ = 545503659420.

The previous prime is 818255489131. The next prime is 818255489141. The reversal of 818255489133 is 331984552818.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 818255489133 - 2¹ = 818255489131 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (818255489131) 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, 136375914853 + ... + 136375914858.

It is an arithmetic number, because the mean of its divisors is an integer number (272751829712).

Almost surely, 2^818255489133 is an apocalyptic number.

It is an amenable number.

818255489133 is a deficient number, since it is larger than the sum of its proper divisors (272751829715).

818255489133 is a wasteful number, since it uses less digits than its factorization.

818255489133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272751829714.

The product of its digits is 8294400, while the sum is 57.

The spelling of 818255489133 in words is "eight hundred eighteen billion, two hundred fifty-five million, four hundred eighty-nine thousand, one hundred thirty-three".