720157417885620 has 864 divisors, whose sum is σ = 2713340965870080. Its totient is φ = 152402876559360.

The previous prime is 720157417885603. The next prime is 720157417885643. The reversal of 720157417885620 is 26588714751027.

720157417885620 is a `hidden beast` number, since 7 + 2 + 0 + 1 + 57 + 4 + 17 + 8 + 8 + 562 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 5287159557 + ... + 5287295763.

It is an arithmetic number, because the mean of its divisors is an integer number (3140440932720).

Almost surely, 2^{720157417885620} 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 720157417885620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1356670482935040).

720157417885620 is an abundant number, since it is smaller than the sum of its proper divisors (1993183547984460).

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

720157417885620 is a wasteful number, since it uses less digits than its factorization.

720157417885620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136853 (or 136829 counting only the distinct ones).

The product of its (nonzero) digits is 52684800, while the sum is 63.

The spelling of 720157417885620 in words is "seven hundred twenty trillion, one hundred fifty-seven billion, four hundred seventeen million, eight hundred eighty-five thousand, six hundred twenty".