1720661260141 has 2 divisors, whose sum is σ = 1720661260142.
Its totient is φ = 1720661260140.
The previous prime is 1720661260117. The next prime is 1720661260159. The reversal of 1720661260141 is 1410621660271.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 1704930832900 + 15730427241 = 1305730^2 + 125421^2
It is a cyclic number.
It is not a de Polignac number, because 1720661260141 - 213 = 1720661251949 is a prime.
It is a self number, because there is not a number n which added to its sum of digits gives 1720661260141.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (1720661261141) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 860330630070 + 860330630071.
It is an arithmetic number, because the mean of its divisors is an integer number (860330630071).
Almost surely, 21720661260141 is an apocalyptic number.
It is an amenable number.
1720661260141 is a deficient number, since it is larger than the sum of its proper divisors (1).
1720661260141 is an equidigital number, since it uses as much as digits as its factorization.
1720661260141 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 24192, while the sum is 37.
The spelling of 1720661260141 in words is "one trillion, seven hundred twenty billion, six hundred sixty-one million, two hundred sixty thousand, one hundred forty-one".