1720651260247 has 2 divisors, whose sum is σ = 1720651260248. Its totient is φ = 1720651260246.

The previous prime is 1720651260151. The next prime is 1720651260277. The reversal of 1720651260247 is 7420621560271.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1720651260247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1720651260277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 860325630123 + 860325630124.

It is an arithmetic number, because the mean of its divisors is an integer number (860325630124).

Almost surely, 2^{1720651260247} is an apocalyptic number.

1720651260247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1720651260247 is an equidigital number, since it uses as much as digits as its factorization.

1720651260247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 282240, while the sum is 43.

The spelling of 1720651260247 in words is "one trillion, seven hundred twenty billion, six hundred fifty-one million, two hundred sixty thousand, two hundred forty-seven".