188136458645 has 4 divisors (see below), whose sum is σ = 225763750380. Its totient is φ = 150509166912.

The previous prime is 188136458617. The next prime is 188136458647. The reversal of 188136458645 is 546854631881.

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

It can be written as a sum of positive squares in 2 ways, for example, as 43734938641 + 144401520004 = 209129^2 + 380002^2 .

It is a cyclic number.

It is not a de Polignac number, because 188136458645 - 2¹⁴ = 188136442261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188136458647) 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, 18813645860 + ... + 18813645869.

It is an arithmetic number, because the mean of its divisors is an integer number (56440937595).

Almost surely, 2^188136458645 is an apocalyptic number.

It is an amenable number.

188136458645 is a deficient number, since it is larger than the sum of its proper divisors (37627291735).

188136458645 is an equidigital number, since it uses as much as digits as its factorization.

188136458645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37627291734.

The product of its digits is 22118400, while the sum is 59.

The spelling of 188136458645 in words is "one hundred eighty-eight billion, one hundred thirty-six million, four hundred fifty-eight thousand, six hundred forty-five".