1685168518497 has 16 divisors (see below), whose sum is σ = 2255927139072. Its totient is φ = 1118931114240.

The previous prime is 1685168518483. The next prime is 1685168518543. The reversal of 1685168518497 is 7948158615861.

It is not a de Polignac number, because 1685168518497 - 2³⁶ = 1616449041761 is a prime.

It is a super-2 number, since 2×1685168518497² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1685168518457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1619097 + ... + 2447817.

It is an arithmetic number, because the mean of its divisors is an integer number (140995446192).

Almost surely, 2^{1685168518497} is an apocalyptic number.

It is an amenable number.

1685168518497 is a deficient number, since it is larger than the sum of its proper divisors (570758620575).

1685168518497 is a wasteful number, since it uses less digits than its factorization.

1685168518497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831448.

The product of its digits is 116121600, while the sum is 69.

The spelling of 1685168518497 in words is "one trillion, six hundred eighty-five billion, one hundred sixty-eight million, five hundred eighteen thousand, four hundred ninety-seven".