720783021312 has 144 divisors (see below), whose sum is σ = 2132881296000. Its totient is φ = 240103305216.

The previous prime is 720783021223. The next prime is 720783021341. The reversal of 720783021312 is 213120387027.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10742364 + ... + 10809252.

Almost surely, 2^720783021312 is an apocalyptic number.

720783021312 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 720783021312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1066440648000).

720783021312 is an abundant number, since it is smaller than the sum of its proper divisors (1412098274688).

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

720783021312 is a wasteful number, since it uses less digits than its factorization.

720783021312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68473 (or 68453 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The spelling of 720783021312 in words is "seven hundred twenty billion, seven hundred eighty-three million, twenty-one thousand, three hundred twelve".