8725547681 has 4 divisors (see below), whose sum is σ = 8961373332. Its totient is φ = 8489722032.

The previous prime is 8725547641. The next prime is 8725547689. The reversal of 8725547681 is 1867455278.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4171997281 + 4553550400 = 64591^2 + 67480^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8725547681 is a prime.

It is a super-2 number, since 2×8725547681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8725547689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117912770 + ... + 117912843.

It is an arithmetic number, because the mean of its divisors is an integer number (2240343333).

Almost surely, 2^8725547681 is an apocalyptic number.

It is an amenable number.

8725547681 is a deficient number, since it is larger than the sum of its proper divisors (235825651).

8725547681 is a wasteful number, since it uses less digits than its factorization.

8725547681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235825650.

The product of its digits is 3763200, while the sum is 53.

The square root of 8725547681 is about 93410.6400845214. The cubic root of 8725547681 is about 2058.7213355718.

The spelling of 8725547681 in words is "eight billion, seven hundred twenty-five million, five hundred forty-seven thousand, six hundred eighty-one".