188991575489 has 8 divisors (see below), whose sum is σ = 192272980200. Its totient is φ = 185716080000.

The previous prime is 188991575459. The next prime is 188991575501. The reversal of 188991575489 is 984575199881.

It can be written as a sum of positive squares in 4 ways, for example, as 16739184400 + 172252391089 = 129380^2 + 415033^2 .

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 188991575489 - 2¹⁶ = 188991509953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (188991575459) 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, 1412762 + ... + 1540739.

It is an arithmetic number, because the mean of its divisors is an integer number (24034122525).

Almost surely, 2^188991575489 is an apocalyptic number.

It is an amenable number.

188991575489 is a deficient number, since it is larger than the sum of its proper divisors (3281404711).

188991575489 is a wasteful number, since it uses less digits than its factorization.

188991575489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2954611.

The product of its digits is 261273600, while the sum is 74.

The spelling of 188991575489 in words is "one hundred eighty-eight billion, nine hundred ninety-one million, five hundred seventy-five thousand, four hundred eighty-nine".