8081187764049 has 27 divisors (see below), whose sum is σ = 11850486287913. Its totient is φ = 5306673438792.

The previous prime is 8081187764021. The next prime is 8081187764051. The reversal of 8081187764049 is 9404677811808.

The square root of 8081187764049 is 2842743.

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

8081187764049 is a `hidden beast` number, since 8 + 0 + 81 + 1 + 87 + 76 + 404 + 9 = 666.

It is not a de Polignac number, because 8081187764049 - 2¹⁹ = 8081187239761 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8081187764099) 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, 571384272 + ... + 571398414.

Almost surely, 2^{8081187764049} is an apocalyptic number.

8081187764049 is the 2842743-rd square number.

8081187764049 is the 1421372-nd centered octagonal number.

It is an amenable number.

8081187764049 is a deficient number, since it is larger than the sum of its proper divisors (3769298523864).

8081187764049 is an frugal number, since it uses more digits than its factorization.

8081187764049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28426 (or 14213 counting only the distinct ones).

The product of its (nonzero) digits is 21676032, while the sum is 63.

The spelling of 8081187764049 in words is "eight trillion, eighty-one billion, one hundred eighty-seven million, seven hundred sixty-four thousand, forty-nine".