188732031489 has 27 divisors (see below), whose sum is σ = 274483707043. Its totient is φ = 124963783584.

The previous prime is 188732031487. The next prime is 188732031539. The reversal of 188732031489 is 984130237881.

It is a happy number.

The square root of 188732031489 is 434433.

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

188732031489 is a `hidden beast` number, since 188 + 73 + 2 + 0 + 314 + 89 = 666.

It can be written as a sum of positive squares in only one way, i.e., 166123901889 + 22608129600 = 407583^2 + 150360^2 .

It is not a de Polignac number, because 188732031489 - 2¹ = 188732031487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (188732031487) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 233290117 + ... + 233290925.

Almost surely, 2^188732031489 is an apocalyptic number.

188732031489 is the 434433-rd square number.

188732031489 is the 217217-th centered octagonal number.

It is an amenable number.

188732031489 is a deficient number, since it is larger than the sum of its proper divisors (85751675554).

188732031489 is an frugal number, since it uses more digits than its factorization.

188732031489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1982 (or 991 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The spelling of 188732031489 in words is "one hundred eighty-eight billion, seven hundred thirty-two million, thirty-one thousand, four hundred eighty-nine".