815559364 has 27 divisors (see below), whose sum is σ = 1451522541. Its totient is φ = 400954320.

The previous prime is 815559361. The next prime is 815559379. The reversal of 815559364 is 463955518.

The square root of 815559364 is 28558.

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., 568440964 + 247118400 = 23842^2 + 15720^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (815559361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6225579 + ... + 6225709.

Almost surely, 2^815559364 is an apocalyptic number.

815559364 is the 28558-th square number.

It is an amenable number.

815559364 is a deficient number, since it is larger than the sum of its proper divisors (635963177).

815559364 is a wasteful number, since it uses less digits than its factorization.

815559364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484 (or 242 counting only the distinct ones).

The product of its digits is 648000, while the sum is 46.

The cubic root of 815559364 is about 934.2975130785.

It can be divided in two parts, 81 and 5559364, that added together give a triangular number (5559445 = T₃₃₃₄).

The spelling of 815559364 in words is "eight hundred fifteen million, five hundred fifty-nine thousand, three hundred sixty-four".