720831951840 has 1536 divisors, whose sum is σ = 3295705190400. Its totient is φ = 130056192000.

The previous prime is 720831951811. The next prime is 720831951899. The reversal of 720831951840 is 48159138027.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 720831951840.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 400238940 + ... + 400240740.

It is an arithmetic number, because the mean of its divisors is an integer number (2145641400).

Almost surely, 2^720831951840 is an apocalyptic number.

720831951840 is a gapful number since it is divisible by the number (70) 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 720831951840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1647852595200).

720831951840 is an abundant number, since it is smaller than the sum of its proper divisors (2574873238560).

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

720831951840 is a wasteful number, since it uses less digits than its factorization.

720831951840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1881 (or 1859 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 48.

The spelling of 720831951840 in words is "seven hundred twenty billion, eight hundred thirty-one million, nine hundred fifty-one thousand, eight hundred forty".