764568364816 has 15 divisors (see below), whose sum is σ = 1481357983431. Its totient is φ = 382282433616.

The previous prime is 764568364801. The next prime is 764568364897. The reversal of 764568364816 is 618463865467.

The square root of 764568364816 is 874396.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3388285 + ... + 3606883.

Almost surely, 2^764568364816 is an apocalyptic number.

764568364816 is the 874396-th square number.

It is an amenable number.

764568364816 is a deficient number, since it is larger than the sum of its proper divisors (716789618615).

764568364816 is an frugal number, since it uses more digits than its factorization.

764568364816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437206 (or 218601 counting only the distinct ones).

The product of its digits is 139345920, while the sum is 64.

Multiplying 764568364816 by its sum of digits (64), we get a square (48932375348224 = 6995168²).

The spelling of 764568364816 in words is "seven hundred sixty-four billion, five hundred sixty-eight million, three hundred sixty-four thousand, eight hundred sixteen".