721373349632 has 144 divisors (see below), whose sum is σ = 1576178208192. Its totient is φ = 327511572480.

The previous prime is 721373349623. The next prime is 721373349661. The reversal of 721373349632 is 236943373127.

721373349632 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 15 ways as a sum of consecutive naturals, for example, 53903582 + ... + 53916962.

Almost surely, 2^721373349632 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 721373349632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (788089104096).

721373349632 is an abundant number, since it is smaller than the sum of its proper divisors (854804858560).

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

721373349632 is a wasteful number, since it uses less digits than its factorization.

721373349632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13674 (or 13660 counting only the distinct ones).

The product of its digits is 3429216, while the sum is 50.

The spelling of 721373349632 in words is "seven hundred twenty-one billion, three hundred seventy-three million, three hundred forty-nine thousand, six hundred thirty-two".