1685022867041 has 2 divisors, whose sum is σ = 1685022867042. Its totient is φ = 1685022867040.

The previous prime is 1685022867013. The next prime is 1685022867079. The reversal of 1685022867041 is 1407682205861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1385967007441 + 299055859600 = 1177271^2 + 546860^2 .

It is an emirp because it is prime and its reverse (1407682205861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1685022867041 - 2²² = 1685018672737 is a prime.

It is not a weakly prime, because it can be changed into another prime (1685022867001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 842511433520 + 842511433521.

It is an arithmetic number, because the mean of its divisors is an integer number (842511433521).

Almost surely, 2^{1685022867041} is an apocalyptic number.

It is an amenable number.

1685022867041 is a deficient number, since it is larger than the sum of its proper divisors (1).

1685022867041 is an equidigital number, since it uses as much as digits as its factorization.

1685022867041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1290240, while the sum is 50.

The spelling of 1685022867041 in words is "one trillion, six hundred eighty-five billion, twenty-two million, eight hundred sixty-seven thousand, forty-one".