188850215761 has 9 divisors (see below), whose sum is σ = 191504812689. Its totient is φ = 186231937536.

The previous prime is 188850215747. The next prime is 188850215767. The reversal of 188850215761 is 167512058881.

The square root of 188850215761 is 434569.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 64805375761 + 124044840000 = 254569^2 + 352200^2 .

It is not a de Polignac number, because 188850215761 - 2⁷ = 188850215633 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 188850215699 and 188850215708.

It is not an unprimeable number, because it can be changed into a prime (188850215767) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 31720561 + ... + 31726513.

It is an arithmetic number, because the mean of its divisors is an integer number (21278312521).

Almost surely, 2^188850215761 is an apocalyptic number.

188850215761 is the 434569-th square number.

188850215761 is the 217285-th centered octagonal number.

It is an amenable number.

188850215761 is a deficient number, since it is larger than the sum of its proper divisors (2654596928).

188850215761 is an frugal number, since it uses more digits than its factorization.

188850215761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12052 (or 6026 counting only the distinct ones).

The product of its (nonzero) digits is 1075200, while the sum is 52.

The spelling of 188850215761 in words is "one hundred eighty-eight billion, eight hundred fifty million, two hundred fifteen thousand, seven hundred sixty-one".