281819118204 has 72 divisors (see below), whose sum is σ = 768188672160. Its totient is φ = 86598916992.

The previous prime is 281819118193. The next prime is 281819118221. The reversal of 281819118204 is 402811918182.

It is a happy number.

281819118204 is a `hidden beast` number, since 281 + 8 + 191 + 182 + 0 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 281819118204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43464 + ... + 752015.

Almost surely, 2^281819118204 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 281819118204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (384094336080).

281819118204 is an abundant number, since it is smaller than the sum of its proper divisors (486369553956).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

281819118204 is a wasteful number, since it uses less digits than its factorization.

281819118204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796259 (or 796254 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 45.

The spelling of 281819118204 in words is "two hundred eighty-one billion, eight hundred nineteen million, one hundred eighteen thousand, two hundred four".