1685016668331 has 32 divisors (see below), whose sum is σ = 2585116952640. Its totient is φ = 1084081190400.

The previous prime is 1685016668317. The next prime is 1685016668339. The reversal of 1685016668331 is 1338666105861.

It is not a de Polignac number, because 1685016668331 - 2¹¹ = 1685016666283 is a prime.

It is a super-2 number, since 2×1685016668331² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1685016668339) 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 31 ways as a sum of consecutive naturals, for example, 9564430 + ... + 9739011.

It is an arithmetic number, because the mean of its divisors is an integer number (80784904770).

Almost surely, 2^{1685016668331} is an apocalyptic number.

1685016668331 is a deficient number, since it is larger than the sum of its proper divisors (900100284309).

1685016668331 is a wasteful number, since it uses less digits than its factorization.

1685016668331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19303564 (or 19303558 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The spelling of 1685016668331 in words is "one trillion, six hundred eighty-five billion, sixteen million, six hundred sixty-eight thousand, three hundred thirty-one".