69871934889 has 81 divisors (see below), whose sum is σ = 110253526149. Its totient is φ = 42631626240.

The previous prime is 69871934887. The next prime is 69871934893. The reversal of 69871934889 is 98843917896.

The square root of 69871934889 is 264333.

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

69871934889 is a `hidden beast` number, since 69 + 87 + 1 + 9 + 3 + 488 + 9 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 8823408489 + 61048526400 = 93933^2 + 247080^2 .

It is not a de Polignac number, because 69871934889 - 2¹ = 69871934887 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (69871934887) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 957149757 + ... + 957149829.

Almost surely, 2^69871934889 is an apocalyptic number.

69871934889 is the 264333-rd square number.

69871934889 is the 132167-th centered octagonal number.

It is an amenable number.

69871934889 is a deficient number, since it is larger than the sum of its proper divisors (40381591260).

69871934889 is an equidigital number, since it uses as much as digits as its factorization.

69871934889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328 (or 164 counting only the distinct ones).

The product of its digits is 188116992, while the sum is 72.

The spelling of 69871934889 in words is "sixty-nine billion, eight hundred seventy-one million, nine hundred thirty-four thousand, eight hundred eighty-nine".