718745664 has 224 divisors, whose sum is σ = 2417852416. Its totient is φ = 183306240.

The previous prime is 718745659. The next prime is 718745689. The reversal of 718745664 is 466547817.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 540969 + ... + 542295.

It is an arithmetic number, because the mean of its divisors is an integer number (10793984).

Almost surely, 2^718745664 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 718745664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1208926208).

718745664 is an abundant number, since it is smaller than the sum of its proper divisors (1699106752).

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

718745664 is a wasteful number, since it uses less digits than its factorization.

718745664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393 (or 1383 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 48.

The square root of 718745664 is about 26809.4323699701. The cubic root of 718745664 is about 895.7601664639.

The spelling of 718745664 in words is "seven hundred eighteen million, seven hundred forty-five thousand, six hundred sixty-four".