7200720720001 has 2 divisors, whose sum is σ = 7200720720002. Its totient is φ = 7200720720000.

The previous prime is 7200720719977. The next prime is 7200720720059. The reversal of 7200720720001 is 1000270270027.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4800266284401 + 2400454435600 = 2190951^2 + 1549340^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7200720720001 is a prime.

It is not a weakly prime, because it can be changed into another prime (7200720720101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3600360360000 + 3600360360001.

It is an arithmetic number, because the mean of its divisors is an integer number (3600360360001).

Almost surely, 2^{7200720720001} is an apocalyptic number.

It is an amenable number.

7200720720001 is a deficient number, since it is larger than the sum of its proper divisors (1).

7200720720001 is an equidigital number, since it uses as much as digits as its factorization.

7200720720001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2744, while the sum is 28.

Adding to 7200720720001 its reverse (1000270270027), we get a palindrome (8200990990028).

The spelling of 7200720720001 in words is "seven trillion, two hundred billion, seven hundred twenty million, seven hundred twenty thousand, one".