1685734057219 has 2 divisors, whose sum is σ = 1685734057220. Its totient is φ = 1685734057218.

The previous prime is 1685734057177. The next prime is 1685734057253. The reversal of 1685734057219 is 9127504375861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1685734057219 - 2²¹ = 1685731960067 is a prime.

It is a super-2 number, since 2×1685734057219² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1685734057019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 842867028609 + 842867028610.

It is an arithmetic number, because the mean of its divisors is an integer number (842867028610).

It is a 1-persistent number, because it is pandigital, but 2⋅1685734057219 = 3371468114438 is not.

Almost surely, 2^{1685734057219} is an apocalyptic number.

1685734057219 is a deficient number, since it is larger than the sum of its proper divisors (1).

1685734057219 is an equidigital number, since it uses as much as digits as its factorization.

1685734057219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12700800, while the sum is 58.

The spelling of 1685734057219 in words is "one trillion, six hundred eighty-five billion, seven hundred thirty-four million, fifty-seven thousand, two hundred nineteen".