4186864869489 has 27 divisors (see below), whose sum is σ = 6081225742137. Its totient is φ = 2775851857800.

The previous prime is 4186864869329. The next prime is 4186864869493. The reversal of 4186864869489 is 9849684686814.

The square root of 4186864869489 is 2046183.

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

4186864869489 is a `hidden beast` number, since 4 + 18 + 6 + 8 + 64 + 8 + 69 + 489 = 666.

4186864869489 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-4186864869489 is a prime.

It is a super-2 number, since 2×4186864869489² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4186864865489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1172461074 + ... + 1172464644.

Almost surely, 2^{4186864869489} is an apocalyptic number.

4186864869489 is the 2046183-rd square number.

4186864869489 is the 1023092-nd centered octagonal number.

It is an amenable number.

4186864869489 is a deficient number, since it is larger than the sum of its proper divisors (1894360872648).

4186864869489 is an frugal number, since it uses more digits than its factorization.

4186864869489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7530 (or 3765 counting only the distinct ones).

The product of its digits is 4586471424, while the sum is 81.

Multiplying 4186864869489 by its sum of digits (81), we get a square (339136054428609 = 18415647²).

The spelling of 4186864869489 in words is "four trillion, one hundred eighty-six billion, eight hundred sixty-four million, eight hundred sixty-nine thousand, four hundred eighty-nine".