720881105478820 has 96 divisors (see below), whose sum is σ = 1795131053202816. Its totient is φ = 239712637286400.

The previous prime is 720881105478773. The next prime is 720881105478841. The reversal of 720881105478820 is 28874501188027.

720881105478820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1177527301 + ... + 1178139340.

It is an arithmetic number, because the mean of its divisors is an integer number (18699281804196).

Almost surely, 2^{720881105478820} is an apocalyptic number.

It is an amenable number.

720881105478820 is an abundant number, since it is smaller than the sum of its proper divisors (1074249947723996).

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

720881105478820 is a wasteful number, since it uses less digits than its factorization.

720881105478820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2355666781 (or 2355666779 counting only the distinct ones).

The product of its (nonzero) digits is 16056320, while the sum is 61.

The spelling of 720881105478820 in words is "seven hundred twenty trillion, eight hundred eighty-one billion, one hundred five million, four hundred seventy-eight thousand, eight hundred twenty".