1720938725567 has 2 divisors, whose sum is σ = 1720938725568. Its totient is φ = 1720938725566.

The previous prime is 1720938725491. The next prime is 1720938725591. The reversal of 1720938725567 is 7655278390271.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1720938725567 - 2¹⁴ = 1720938709183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1720938725267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 860469362783 + 860469362784.

It is an arithmetic number, because the mean of its divisors is an integer number (860469362784).

Almost surely, 2^{1720938725567} is an apocalyptic number.

1720938725567 is a deficient number, since it is larger than the sum of its proper divisors (1).

1720938725567 is an equidigital number, since it uses as much as digits as its factorization.

1720938725567 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 44452800, while the sum is 62.

The spelling of 1720938725567 in words is "one trillion, seven hundred twenty billion, nine hundred thirty-eight million, seven hundred twenty-five thousand, five hundred sixty-seven".