1685001668517 has 24 divisors (see below), whose sum is σ = 2567524419200. Its totient is φ = 1061913017088.

The previous prime is 1685001668509. The next prime is 1685001668533. The reversal of 1685001668517 is 7158661005861.

It is a happy number.

1685001668517 is a `hidden beast` number, since 1 + 6 + 8 + 50 + 0 + 16 + 68 + 517 = 666.

It is not a de Polignac number, because 1685001668517 - 2³ = 1685001668509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1685001468517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10562092 + ... + 10720437.

Almost surely, 2^{1685001668517} is an apocalyptic number.

It is an amenable number.

1685001668517 is a deficient number, since it is larger than the sum of its proper divisors (882522750683).

1685001668517 is a wasteful number, since it uses less digits than its factorization.

1685001668517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21283017 (or 21283014 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 54.

The spelling of 1685001668517 in words is "one trillion, six hundred eighty-five billion, one million, six hundred sixty-eight thousand, five hundred seventeen".