718621664 has 48 divisors (see below), whose sum is σ = 1466398080. Its totient is φ = 346298880.

The previous prime is 718621649. The next prime is 718621669. The reversal of 718621664 is 466126817.

718621664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (718621669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 265502 + ... + 268194.

It is an arithmetic number, because the mean of its divisors is an integer number (30549960).

Almost surely, 2^718621664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 718621664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (733199040).

718621664 is an abundant number, since it is smaller than the sum of its proper divisors (747776416).

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

718621664 is a wasteful number, since it uses less digits than its factorization.

718621664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3003 (or 2995 counting only the distinct ones).

The product of its digits is 96768, while the sum is 41.

The square root of 718621664 is about 26807.1196513165. The cubic root of 718621664 is about 895.7086504899.

The spelling of 718621664 in words is "seven hundred eighteen million, six hundred twenty-one thousand, six hundred sixty-four".