721133766812 has 12 divisors (see below), whose sum is σ = 1264171243440. Its totient is φ = 359941982976.

The previous prime is 721133766809. The next prime is 721133766841. The reversal of 721133766812 is 218667331127.

It is a happy number.

721133766812 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 an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156222512 + ... + 156227127.

It is an arithmetic number, because the mean of its divisors is an integer number (105347603620).

Almost surely, 2^721133766812 is an apocalyptic number.

It is an amenable number.

721133766812 is a deficient number, since it is larger than the sum of its proper divisors (543037476628).

721133766812 is a wasteful number, since it uses less digits than its factorization.

721133766812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312450220 (or 312450218 counting only the distinct ones).

The product of its digits is 508032, while the sum is 47.

The spelling of 721133766812 in words is "seven hundred twenty-one billion, one hundred thirty-three million, seven hundred sixty-six thousand, eight hundred twelve".