1688338394012 has 24 divisors (see below), whose sum is σ = 2958884508720. Its totient is φ = 842943628800.

The previous prime is 1688338393919. The next prime is 1688338394021. The reversal of 1688338394012 is 2104938338861.

It is a super-2 number, since 2×1688338394012² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8379914 + ... + 8579022.

It is an arithmetic number, because the mean of its divisors is an integer number (123286854530).

Almost surely, 2^{1688338394012} is an apocalyptic number.

It is an amenable number.

1688338394012 is a deficient number, since it is larger than the sum of its proper divisors (1270546114708).

1688338394012 is a wasteful number, since it uses less digits than its factorization.

1688338394012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202181 (or 202179 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 56.

The spelling of 1688338394012 in words is "one trillion, six hundred eighty-eight billion, three hundred thirty-eight million, three hundred ninety-four thousand, twelve".