720422777856 has 176 divisors, whose sum is σ = 2057836719744. Its totient is φ = 223491096576.

The previous prime is 720422777843. The next prime is 720422777873. The reversal of 720422777856 is 658777224027.

It is a junction number, because it is equal to n+sod(n) for n = 720422777796 and 720422777805.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2476486 + ... + 2752058.

Almost surely, 2^720422777856 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 720422777856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1028918359872).

720422777856 is an abundant number, since it is smaller than the sum of its proper divisors (1337413941888).

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

720422777856 is a wasteful number, since it uses less digits than its factorization.

720422777856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275656 (or 275638 counting only the distinct ones).

The product of its (nonzero) digits is 18439680, while the sum is 57.

The spelling of 720422777856 in words is "seven hundred twenty billion, four hundred twenty-two million, seven hundred seventy-seven thousand, eight hundred fifty-six".