8694640161 has 12 divisors (see below), whose sum is σ = 12560014740. Its totient is φ = 5795923680.

The previous prime is 8694640147. The next prime is 8694640177. The reversal of 8694640161 is 1610464968.

It can be written as a sum of positive squares in 2 ways, for example, as 5898240000 + 2796400161 = 76800^2 + 52881^2 .

It is not a de Polignac number, because 8694640161 - 2¹⁹ = 8694115873 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8694640181) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 89071 + ... + 159131.

It is an arithmetic number, because the mean of its divisors is an integer number (1046667895).

Almost surely, 2^8694640161 is an apocalyptic number.

It is an amenable number.

8694640161 is a deficient number, since it is larger than the sum of its proper divisors (3865374579).

8694640161 is a wasteful number, since it uses less digits than its factorization.

8694640161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83856 (or 83853 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 8694640161 is about 93245.0543514239. The cubic root of 8694640161 is about 2056.2876679432.

The spelling of 8694640161 in words is "eight billion, six hundred ninety-four million, six hundred forty thousand, one hundred sixty-one".