188306817139 has 8 divisors (see below), whose sum is σ = 217800656640. Its totient is φ = 159461194056.

The previous prime is 188306817133. The next prime is 188306817173. The reversal of 188306817139 is 931718603881.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 188306817139 - 2⁷ = 188306817011 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 188306817139.

It is not an unprimeable number, because it can be changed into a prime (188306817133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162053479 + ... + 162054640.

It is an arithmetic number, because the mean of its divisors is an integer number (27225082080).

Almost surely, 2^188306817139 is an apocalyptic number.

188306817139 is a deficient number, since it is larger than the sum of its proper divisors (29493839501).

188306817139 is an equidigital number, since it uses as much as digits as its factorization.

188306817139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324108209.

The product of its (nonzero) digits is 1741824, while the sum is 55.

The spelling of 188306817139 in words is "one hundred eighty-eight billion, three hundred six million, eight hundred seventeen thousand, one hundred thirty-nine".