188131320127 has 4 divisors (see below), whose sum is σ = 188143394656. Its totient is φ = 188119245600.

The previous prime is 188131320109. The next prime is 188131320173. The reversal of 188131320127 is 721023131881.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 188131320127 - 2¹¹ = 188131318079 is a prime.

It is a super-2 number, since 2×188131320127² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188131320197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6013863 + ... + 6045064.

It is an arithmetic number, because the mean of its divisors is an integer number (47035848664).

Almost surely, 2^188131320127 is an apocalyptic number.

188131320127 is a deficient number, since it is larger than the sum of its proper divisors (12074529).

188131320127 is a wasteful number, since it uses less digits than its factorization.

188131320127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12074528.

The product of its (nonzero) digits is 16128, while the sum is 37.

The spelling of 188131320127 in words is "one hundred eighty-eight billion, one hundred thirty-one million, three hundred twenty thousand, one hundred twenty-seven".