723819664 has 10 divisors (see below), whose sum is σ = 1402400630. Its totient is φ = 361909824.

The previous prime is 723819643. The next prime is 723819703. The reversal of 723819664 is 466918327.

It can be written as a sum of positive squares in only one way, i.e., 723179664 + 640000 = 26892^2 + 800^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22619349 + ... + 22619380.

It is an arithmetic number, because the mean of its divisors is an integer number (140240063).

Almost surely, 2^723819664 is an apocalyptic number.

It is an amenable number.

723819664 is a deficient number, since it is larger than the sum of its proper divisors (678580966).

723819664 is a wasteful number, since it uses less digits than its factorization.

723819664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45238737 (or 45238731 counting only the distinct ones).

The product of its digits is 435456, while the sum is 46.

The square root of 723819664 is about 26903.8968181191. The cubic root of 723819664 is about 897.8631048111.

The spelling of 723819664 in words is "seven hundred twenty-three million, eight hundred nineteen thousand, six hundred sixty-four".