7200720719977 has 2 divisors, whose sum is σ = 7200720719978. Its totient is φ = 7200720719976.

The previous prime is 7200720719947. The next prime is 7200720720001. The reversal of 7200720719977 is 7799170270027.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7019935034256 + 180785685721 = 2649516^2 + 425189^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7200720719977 is a prime.

It is not a weakly prime, because it can be changed into another prime (7200720719947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3600360359988 + 3600360359989.

It is an arithmetic number, because the mean of its divisors is an integer number (3600360359989).

Almost surely, 2^{7200720719977} is an apocalyptic number.

It is an amenable number.

7200720719977 is a deficient number, since it is larger than the sum of its proper divisors (1).

7200720719977 is an equidigital number, since it uses as much as digits as its factorization.

7200720719977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5445468, while the sum is 58.

The spelling of 7200720719977 in words is "seven trillion, two hundred billion, seven hundred twenty million, seven hundred nineteen thousand, nine hundred seventy-seven".