186782145489 has 9 divisors (see below), whose sum is σ = 269798305179. Its totient is φ = 124520565960.

The previous prime is 186782145463. The next prime is 186782145497. The reversal of 186782145489 is 984541287681.

The square root of 186782145489 is 432183.

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

186782145489 is a `hidden beast` number, since 1 + 8 + 6 + 7 + 8 + 2 + 145 + 489 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20856269889 + 165925875600 = 144417^2 + 407340^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 186782145489 - 2¹⁵ = 186782112721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (186782145449) 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, 1224519 + ... + 1368579.

Almost surely, 2^186782145489 is an apocalyptic number.

186782145489 is the 432183-rd square number.

186782145489 is the 216092-nd centered octagonal number.

It is an amenable number.

186782145489 is a deficient number, since it is larger than the sum of its proper divisors (83016159690).

186782145489 is an frugal number, since it uses more digits than its factorization.

186782145489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288128 (or 144064 counting only the distinct ones).

The product of its digits is 30965760, while the sum is 63.

The spelling of 186782145489 in words is "one hundred eighty-six billion, seven hundred eighty-two million, one hundred forty-five thousand, four hundred eighty-nine".