188186954797 has 4 divisors (see below), whose sum is σ = 188188335580. Its totient is φ = 188185574016.

The previous prime is 188186954789. The next prime is 188186954801. The reversal of 188186954797 is 797459681881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 797459681881 = 464141 ⋅1718141.

It can be written as a sum of positive squares in 2 ways, for example, as 47302335081 + 140884619716 = 217491^2 + 375346^2 .

It is a cyclic number.

It is not a de Polignac number, because 188186954797 - 2³ = 188186954789 is a prime.

It is a super-2 number, since 2×188186954797² (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 (188186954897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 460422 + ... + 767047.

It is an arithmetic number, because the mean of its divisors is an integer number (47047083895).

Almost surely, 2^188186954797 is an apocalyptic number.

It is an amenable number.

188186954797 is a deficient number, since it is larger than the sum of its proper divisors (1380783).

188186954797 is a wasteful number, since it uses less digits than its factorization.

188186954797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1380782.

The product of its digits is 243855360, while the sum is 73.

The spelling of 188186954797 in words is "one hundred eighty-eight billion, one hundred eighty-six million, nine hundred fifty-four thousand, seven hundred ninety-seven".