818268594724 has 27 divisors (see below), whose sum is σ = 1665786848817. Its totient is φ = 350681113104.

The previous prime is 818268594721. The next prime is 818268594749. The reversal of 818268594724 is 427495862818.

The square root of 818268594724 is 904582.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 237978108900 + 580290485824 = 487830^2 + 761768^2 .

It is a super-2 number, since 2×818268594724² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (818268594721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 12631842 + ... + 12696454.

Almost surely, 2^818268594724 is an apocalyptic number.

818268594724 is the 904582-nd square number.

It is an amenable number.

818268594724 is an abundant number, since it is smaller than the sum of its proper divisors (847518254093).

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

818268594724 is an frugal number, since it uses more digits than its factorization.

818268594724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129244 (or 64622 counting only the distinct ones).

The product of its digits is 61931520, while the sum is 64.

Multiplying 818268594724 by its sum of digits (64), we get a square (52369190062336 = 7236656²).

The spelling of 818268594724 in words is "eight hundred eighteen billion, two hundred sixty-eight million, five hundred ninety-four thousand, seven hundred twenty-four".