720391654881 has 16 divisors (see below), whose sum is σ = 1067409428800. Its totient is φ = 480187963584.

The previous prime is 720391654861. The next prime is 720391654901. The reversal of 720391654881 is 188456193027.

720391654881 is a `hidden beast` number, since 7 + 2 + 0 + 3 + 9 + 16 + 548 + 81 = 666.

It is an interprime number because it is at equal distance from previous prime (720391654861) and next prime (720391654901).

It is not a de Polignac number, because 720391654881 - 2¹⁷ = 720391523809 is a prime.

It is a super-2 number, since 2×720391654881² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (720391654841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1850791 + ... + 2205948.

It is an arithmetic number, because the mean of its divisors is an integer number (66713089300).

It is a 1-persistent number, because it is pandigital, but 2⋅720391654881 = 1440783309762 is not.

Almost surely, 2^720391654881 is an apocalyptic number.

It is an amenable number.

720391654881 is a deficient number, since it is larger than the sum of its proper divisors (347017773919).

720391654881 is a wasteful number, since it uses less digits than its factorization.

720391654881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4063325 (or 4063319 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The spelling of 720391654881 in words is "seven hundred twenty billion, three hundred ninety-one million, six hundred fifty-four thousand, eight hundred eighty-one".