720739345920 has 960 divisors, whose sum is σ = 2648278499328. Its totient is φ = 166905446400.

The previous prime is 720739345919. The next prime is 720739345933. The reversal of 720739345920 is 29543937027.

It is a tau number, because it is divible by the number of its divisors (960).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3658575262 + ... + 3658575458.

Almost surely, 2^720739345920 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 720739345920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1324139249664).

720739345920 is an abundant number, since it is smaller than the sum of its proper divisors (1927539153408).

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

720739345920 is a wasteful number, since it uses less digits than its factorization.

720739345920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403 (or 376 counting only the distinct ones).

The product of its (nonzero) digits is 2857680, while the sum is 51.

The spelling of 720739345920 in words is "seven hundred twenty billion, seven hundred thirty-nine million, three hundred forty-five thousand, nine hundred twenty".