1708705221911 has 2 divisors, whose sum is σ = 1708705221912. Its totient is φ = 1708705221910.

The previous prime is 1708705221857. The next prime is 1708705221913. The reversal of 1708705221911 is 1191225078071.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1708705221911 - 2²⁶ = 1708638113047 is a prime.

Together with 1708705221913, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1708705221913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 854352610955 + 854352610956.

It is an arithmetic number, because the mean of its divisors is an integer number (854352610956).

Almost surely, 2^{1708705221911} is an apocalyptic number.

1708705221911 is a deficient number, since it is larger than the sum of its proper divisors (1).

1708705221911 is an equidigital number, since it uses as much as digits as its factorization.

1708705221911 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70560, while the sum is 44.

The spelling of 1708705221911 in words is "one trillion, seven hundred eight billion, seven hundred five million, two hundred twenty-one thousand, nine hundred eleven".