818546004 has 18 divisors (see below), whose sum is σ = 2069102490. Its totient is φ = 272848656.

The previous prime is 818545993. The next prime is 818546063. The reversal of 818546004 is 400645818.

It can be written as a sum of positive squares in only one way, i.e., 682776900 + 135769104 = 26130^2 + 11652^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 22737389 = 818546004 / (8 + 1 + 8 + 5 + 4 + 6 + 0 + 0 + 4).

It is a self number, because there is not a number n which added to its sum of digits gives 818546004.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 11368659 + ... + 11368730.

Almost surely, 2^818546004 is an apocalyptic number.

It is an amenable number.

818546004 is an abundant number, since it is smaller than the sum of its proper divisors (1250556486).

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

818546004 is a wasteful number, since it uses less digits than its factorization.

818546004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22737399 (or 22737394 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 818546004 is about 28610.2429909290. The cubic root of 818546004 is about 935.4366130752.

The spelling of 818546004 in words is "eight hundred eighteen million, five hundred forty-six thousand, four".