721016705912 has 64 divisors (see below), whose sum is σ = 1390236825600. Its totient is φ = 350446929280.

The previous prime is 721016705911. The next prime is 721016705917. The reversal of 721016705912 is 219507610127.

It is a self number, because there is not a number n which added to its sum of digits gives 721016705912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721016705911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23981273 + ... + 24011319.

It is an arithmetic number, because the mean of its divisors is an integer number (21722450400).

Almost surely, 2^721016705912 is an apocalyptic number.

It is an amenable number.

721016705912 is a deficient number, since it is larger than the sum of its proper divisors (669220119688).

721016705912 is a wasteful number, since it uses less digits than its factorization.

721016705912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30716 (or 30712 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 41.

The spelling of 721016705912 in words is "seven hundred twenty-one billion, sixteen million, seven hundred five thousand, nine hundred twelve".