1688030685388 has 24 divisors (see below), whose sum is σ = 2955349108880. Its totient is φ = 843645326400.

The previous prime is 1688030685331. The next prime is 1688030685461. The reversal of 1688030685388 is 8835860308861.

It is a super-2 number, since 2×1688030685388² (a number of 25 digits) contains 22 as substring.

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, 118094770 + ... + 118109062.

Almost surely, 2^{1688030685388} is an apocalyptic number.

It is an amenable number.

1688030685388 is a deficient number, since it is larger than the sum of its proper divisors (1267318423492).

1688030685388 is a wasteful number, since it uses less digits than its factorization.

1688030685388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25177 (or 25175 counting only the distinct ones).

The product of its (nonzero) digits is 53084160, while the sum is 64.

The spelling of 1688030685388 in words is "one trillion, six hundred eighty-eight billion, thirty million, six hundred eighty-five thousand, three hundred eighty-eight".