720072064656 has 400 divisors, whose sum is σ = 2494817107200. Its totient is φ = 196043037696.

The previous prime is 720072064637. The next prime is 720072064693. The reversal of 720072064656 is 656460270027.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 56122050 + ... + 56134878.

It is an arithmetic number, because the mean of its divisors is an integer number (6237042768).

Almost surely, 2^720072064656 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 720072064656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1247408553600).

720072064656 is an abundant number, since it is smaller than the sum of its proper divisors (1774745042544).

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

720072064656 is a wasteful number, since it uses less digits than its factorization.

720072064656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13148 (or 13133 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 45.

The spelling of 720072064656 in words is "seven hundred twenty billion, seventy-two million, sixty-four thousand, six hundred fifty-six".