8581727187641 has 2 divisors, whose sum is σ = 8581727187642. Its totient is φ = 8581727187640.

The previous prime is 8581727187613. The next prime is 8581727187707. The reversal of 8581727187641 is 1467817271858.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7155384252025 + 1426342935616 = 2674955^2 + 1194296^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8581727187641 is a prime.

It is not a weakly prime, because it can be changed into another prime (8581727187841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4290863593820 + 4290863593821.

It is an arithmetic number, because the mean of its divisors is an integer number (4290863593821).

Almost surely, 2^{8581727187641} is an apocalyptic number.

It is an amenable number.

8581727187641 is a deficient number, since it is larger than the sum of its proper divisors (1).

8581727187641 is an equidigital number, since it uses as much as digits as its factorization.

8581727187641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42147840, while the sum is 65.

The spelling of 8581727187641 in words is "eight trillion, five hundred eighty-one billion, seven hundred twenty-seven million, one hundred eighty-seven thousand, six hundred forty-one".