1685170613293 has 2 divisors, whose sum is σ = 1685170613294. Its totient is φ = 1685170613292.

The previous prime is 1685170613279. The next prime is 1685170613317. The reversal of 1685170613293 is 3923160715861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1680502580964 + 4668032329 = 1296342^2 + 68323^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1685170613293 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1685170613293.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1685170613593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 842585306646 + 842585306647.

It is an arithmetic number, because the mean of its divisors is an integer number (842585306647).

Almost surely, 2^{1685170613293} is an apocalyptic number.

It is an amenable number.

1685170613293 is a deficient number, since it is larger than the sum of its proper divisors (1).

1685170613293 is an equidigital number, since it uses as much as digits as its factorization.

1685170613293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1632960, while the sum is 52.

The spelling of 1685170613293 in words is "one trillion, six hundred eighty-five billion, one hundred seventy million, six hundred thirteen thousand, two hundred ninety-three".