8712159705 has 24 divisors (see below), whose sum is σ = 15103987080. Its totient is φ = 4645589760.

The previous prime is 8712159649. The next prime is 8712159721. The reversal of 8712159705 is 5079512178.

It can be written as a sum of positive squares in 4 ways, for example, as 417139776 + 8295019929 = 20424^2 + 91077^2 .

It is not a de Polignac number, because 8712159705 - 2¹⁰ = 8712158681 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 264765 + ... + 295845.

It is an arithmetic number, because the mean of its divisors is an integer number (629332795).

Almost surely, 2^8712159705 is an apocalyptic number.

It is an amenable number.

8712159705 is a deficient number, since it is larger than the sum of its proper divisors (6391827375).

8712159705 is a wasteful number, since it uses less digits than its factorization.

8712159705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37321 (or 37318 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 45.

The square root of 8712159705 is about 93338.9506315557. The cubic root of 8712159705 is about 2057.6678689227.

The spelling of 8712159705 in words is "eight billion, seven hundred twelve million, one hundred fifty-nine thousand, seven hundred five".