8647125081 has 8 divisors (see below), whose sum is σ = 13176571584. Its totient is φ = 4941214320.

The previous prime is 8647125023. The next prime is 8647125163. The reversal of 8647125081 is 1805217468.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8647125081 - 2⁹ = 8647124569 is a prime.

It is a super-2 number, since 2×8647125081² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8647125281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205883910 + ... + 205883951.

It is an arithmetic number, because the mean of its divisors is an integer number (1647071448).

Almost surely, 2^8647125081 is an apocalyptic number.

It is an amenable number.

8647125081 is a deficient number, since it is larger than the sum of its proper divisors (4529446503).

8647125081 is a wasteful number, since it uses less digits than its factorization.

8647125081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411767871.

The product of its (nonzero) digits is 107520, while the sum is 42.

The square root of 8647125081 is about 92989.9192439697. The cubic root of 8647125081 is about 2052.5350420079.

The spelling of 8647125081 in words is "eight billion, six hundred forty-seven million, one hundred twenty-five thousand, eighty-one".