8581127994913 has 2 divisors, whose sum is σ = 8581127994914. Its totient is φ = 8581127994912.

The previous prime is 8581127994731. The next prime is 8581127994931. The reversal of 8581127994913 is 3194997211858.

Together with next prime (8581127994931) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8181270325264 + 399857669649 = 2860292^2 + 632343^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8581127994913 is a prime.

It is not a weakly prime, because it can be changed into another prime (8581127994713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4290563997456 + 4290563997457.

It is an arithmetic number, because the mean of its divisors is an integer number (4290563997457).

Almost surely, 2^{8581127994913} is an apocalyptic number.

It is an amenable number.

8581127994913 is a deficient number, since it is larger than the sum of its proper divisors (1).

8581127994913 is an equidigital number, since it uses as much as digits as its factorization.

8581127994913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39191040, while the sum is 67.

The spelling of 8581127994913 in words is "eight trillion, five hundred eighty-one billion, one hundred twenty-seven million, nine hundred ninety-four thousand, nine hundred thirteen".