671118942709 has 2 divisors, whose sum is σ = 671118942710. Its totient is φ = 671118942708.

The previous prime is 671118942551. The next prime is 671118942719. The reversal of 671118942709 is 907249811176.

It is a happy number.

671118942709 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 594363902500 + 76755040209 = 770950^2 + 277047^2 .

It is a cyclic number.

It is not a de Polignac number, because 671118942709 - 2¹³ = 671118934517 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 671118942709.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671118942719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335559471354 + 335559471355.

It is an arithmetic number, because the mean of its divisors is an integer number (335559471355).

Almost surely, 2^671118942709 is an apocalyptic number.

It is an amenable number.

671118942709 is a deficient number, since it is larger than the sum of its proper divisors (1).

671118942709 is an equidigital number, since it uses as much as digits as its factorization.

671118942709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1524096, while the sum is 55.

The spelling of 671118942709 in words is "six hundred seventy-one billion, one hundred eighteen million, nine hundred forty-two thousand, seven hundred nine".