188691868669 has 16 divisors (see below), whose sum is σ = 195867504000. Its totient is φ = 181561504320.

The previous prime is 188691868609. The next prime is 188691868711. The reversal of 188691868669 is 966868196881.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-188691868669 is a prime.

It is a super-2 number, since 2×188691868669² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 188691868595 and 188691868604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188691868609) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19370002 + ... + 19379740.

It is an arithmetic number, because the mean of its divisors is an integer number (12241719000).

Almost surely, 2^188691868669 is an apocalyptic number.

It is an amenable number.

188691868669 is a deficient number, since it is larger than the sum of its proper divisors (7175635331).

188691868669 is a wasteful number, since it uses less digits than its factorization.

188691868669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11988.

The product of its digits is 429981696, while the sum is 76.

The spelling of 188691868669 in words is "one hundred eighty-eight billion, six hundred ninety-one million, eight hundred sixty-eight thousand, six hundred sixty-nine".