721500008016 has 20 divisors (see below), whose sum is σ = 1863875020832. Its totient is φ = 240500002656.

The previous prime is 721500007981. The next prime is 721500008059. The reversal of 721500008016 is 610800005127.

721500008016 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, 7515625036 + ... + 7515625131.

Almost surely, 2^721500008016 is an apocalyptic number.

It is an amenable number.

721500008016 is an abundant number, since it is smaller than the sum of its proper divisors (1142375012816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

721500008016 is a wasteful number, since it uses less digits than its factorization.

721500008016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15031250178 (or 15031250172 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 30.

The spelling of 721500008016 in words is "seven hundred twenty-one billion, five hundred million, eight thousand, sixteen".