7200720064656 has 100 divisors (see below), whose sum is σ = 20841648666300. Its totient is φ = 2400162202368.

The previous prime is 7200720064651. The next prime is 7200720064717. The reversal of 7200720064656 is 6564600270027.

It can be written as a sum of positive squares in 2 ways, for example, as 5233040557056 + 1967679507600 = 2287584^2 + 1402740^2 .

It is not an unprimeable number, because it can be changed into a prime (7200720064651) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 51133350 + ... + 51273978.

It is an arithmetic number, because the mean of its divisors is an integer number (208416486663).

Almost surely, 2^{7200720064656} is an apocalyptic number.

It is an amenable number.

7200720064656 is an abundant number, since it is smaller than the sum of its proper divisors (13640928601644).

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

7200720064656 is a wasteful number, since it uses less digits than its factorization.

7200720064656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180158 (or 180143 counting only the distinct ones).

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

The spelling of 7200720064656 in words is "seven trillion, two hundred billion, seven hundred twenty million, sixty-four thousand, six hundred fifty-six".