728743217264 has 10 divisors (see below), whose sum is σ = 1411939983480. Its totient is φ = 364371608624.

The previous prime is 728743217233. The next prime is 728743217299. The reversal of 728743217264 is 462712347827.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22773225524 + ... + 22773225555.

It is an arithmetic number, because the mean of its divisors is an integer number (141193998348).

Almost surely, 2^728743217264 is an apocalyptic number.

It is an amenable number.

728743217264 is a deficient number, since it is larger than the sum of its proper divisors (683196766216).

728743217264 is a wasteful number, since it uses less digits than its factorization.

728743217264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45546451087 (or 45546451081 counting only the distinct ones).

The product of its digits is 6322176, while the sum is 53.

The spelling of 728743217264 in words is "seven hundred twenty-eight billion, seven hundred forty-three million, two hundred seventeen thousand, two hundred sixty-four".