718668864 has 63 divisors (see below), whose sum is σ = 2061780357. Its totient is φ = 239341824.

The previous prime is 718668857. The next prime is 718668917. The reversal of 718668864 is 468866817.

The square root of 718668864 is 26808.

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., 31809600 + 686859264 = 5640^2 + 26208^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 718668864.

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, 642834 + ... + 643950.

Almost surely, 2^718668864 is an apocalyptic number.

718668864 is the 26808-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 718668864

718668864 is an abundant number, since it is smaller than the sum of its proper divisors (1343111493).

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

718668864 is an equidigital number, since it uses as much as digits as its factorization.

718668864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2252 (or 1122 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 54.

The cubic root of 718668864 is about 895.7282604946.

The spelling of 718668864 in words is "seven hundred eighteen million, six hundred sixty-eight thousand, eight hundred sixty-four".