8871443147681 has 2 divisors, whose sum is σ = 8871443147682. Its totient is φ = 8871443147680.

The previous prime is 8871443147659. The next prime is 8871443147687. The reversal of 8871443147681 is 1867413441788.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6650699421025 + 2220743726656 = 2578895^2 + 1490216^2 .

It is a cyclic number.

It is not a de Polignac number, because 8871443147681 - 2¹⁸ = 8871442885537 is a prime.

It is a super-2 number, since 2×8871443147681² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8871443147687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4435721573840 + 4435721573841.

It is an arithmetic number, because the mean of its divisors is an integer number (4435721573841).

Almost surely, 2^{8871443147681} is an apocalyptic number.

It is an amenable number.

8871443147681 is a deficient number, since it is larger than the sum of its proper divisors (1).

8871443147681 is an equidigital number, since it uses as much as digits as its factorization.

8871443147681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28901376, while the sum is 62.

The spelling of 8871443147681 in words is "eight trillion, eight hundred seventy-one billion, four hundred forty-three million, one hundred forty-seven thousand, six hundred eighty-one".