818417664 has 117 divisors (see below), whose sum is σ = 2380001533. Its totient is φ = 270974976.

The previous prime is 818417657. The next prime is 818417693. The reversal of 818417664 is 466714818.

The square root of 818417664 is 28608.

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., 95883264 + 722534400 = 9792^2 + 26880^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5492662 + ... + 5492810.

Almost surely, 2^818417664 is an apocalyptic number.

818417664 is the 28608-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 818417664

818417664 is an abundant number, since it is smaller than the sum of its proper divisors (1561583869).

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

818417664 is an equidigital number, since it uses as much as digits as its factorization.

818417664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328 (or 154 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The cubic root of 818417664 is about 935.3877214188.

The spelling of 818417664 in words is "eight hundred eighteen million, four hundred seventeen thousand, six hundred sixty-four".