8128855344971 has 2 divisors, whose sum is σ = 8128855344972. Its totient is φ = 8128855344970.

The previous prime is 8128855344949. The next prime is 8128855344977. The reversal of 8128855344971 is 1794435588218.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8128855344971 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8128855344898 and 8128855344907.

It is not a weakly prime, because it can be changed into another prime (8128855344977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4064427672485 + 4064427672486.

It is an arithmetic number, because the mean of its divisors is an integer number (4064427672486).

Almost surely, 2^{8128855344971} is an apocalyptic number.

8128855344971 is a deficient number, since it is larger than the sum of its proper divisors (1).

8128855344971 is an equidigital number, since it uses as much as digits as its factorization.

8128855344971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77414400, while the sum is 65.

The spelling of 8128855344971 in words is "eight trillion, one hundred twenty-eight billion, eight hundred fifty-five million, three hundred forty-four thousand, nine hundred seventy-one".