1720231522753 has 2 divisors, whose sum is σ = 1720231522754. Its totient is φ = 1720231522752.

The previous prime is 1720231522729. The next prime is 1720231522837. The reversal of 1720231522753 is 3572251320271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1562282507569 + 157949015184 = 1249913^2 + 397428^2 .

It is a cyclic number.

It is not a de Polignac number, because 1720231522753 - 2⁹ = 1720231522241 is a prime.

It is not a weakly prime, because it can be changed into another prime (1720231522453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 860115761376 + 860115761377.

It is an arithmetic number, because the mean of its divisors is an integer number (860115761377).

Almost surely, 2^{1720231522753} is an apocalyptic number.

It is an amenable number.

1720231522753 is a deficient number, since it is larger than the sum of its proper divisors (1).

1720231522753 is an equidigital number, since it uses as much as digits as its factorization.

1720231522753 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 176400, while the sum is 40.

The spelling of 1720231522753 in words is "one trillion, seven hundred twenty billion, two hundred thirty-one million, five hundred twenty-two thousand, seven hundred fifty-three".