871088408278477 has 2 divisors, whose sum is σ = 871088408278478. Its totient is φ = 871088408278476.

The previous prime is 871088408278411. The next prime is 871088408278507. The reversal of 871088408278477 is 774872804880178.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 654031215033156 + 217057193245321 = 25574034^2 + 14732861^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-871088408278477 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 871088408278397 and 871088408278406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (871088408278177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435544204139238 + 435544204139239.

It is an arithmetic number, because the mean of its divisors is an integer number (435544204139239).

Almost surely, 2^{871088408278477} is an apocalyptic number.

It is an amenable number.

871088408278477 is a deficient number, since it is larger than the sum of its proper divisors (1).

871088408278477 is an equidigital number, since it uses as much as digits as its factorization.

871088408278477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2517630976, while the sum is 79.

The spelling of 871088408278477 in words is "eight hundred seventy-one trillion, eighty-eight billion, four hundred eight million, two hundred seventy-eight thousand, four hundred seventy-seven".