8601640726529 has 2 divisors, whose sum is σ = 8601640726530. Its totient is φ = 8601640726528.

The previous prime is 8601640726501. The next prime is 8601640726559. The reversal of 8601640726529 is 9256270461068.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7949850924304 + 651789802225 = 2819548^2 + 807335^2 .

It is a cyclic number.

It is not a de Polignac number, because 8601640726529 - 2¹⁶ = 8601640660993 is a prime.

It is not a weakly prime, because it can be changed into another prime (8601640726559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4300820363264 + 4300820363265.

It is an arithmetic number, because the mean of its divisors is an integer number (4300820363265).

Almost surely, 2^{8601640726529} is an apocalyptic number.

It is an amenable number.

8601640726529 is a deficient number, since it is larger than the sum of its proper divisors (1).

8601640726529 is an equidigital number, since it uses as much as digits as its factorization.

8601640726529 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8709120, while the sum is 56.

The spelling of 8601640726529 in words is "eight trillion, six hundred one billion, six hundred forty million, seven hundred twenty-six thousand, five hundred twenty-nine".