871256255873 has 2 divisors, whose sum is σ = 871256255874. Its totient is φ = 871256255872.

The previous prime is 871256255867. The next prime is 871256255887. The reversal of 871256255873 is 378552652178.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 459152601664 + 412103654209 = 677608^2 + 641953^2 .

It is a cyclic number.

It is not a de Polignac number, because 871256255873 - 2¹⁴ = 871256239489 is a prime.

It is not a weakly prime, because it can be changed into another prime (871256252873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435628127936 + 435628127937.

It is an arithmetic number, because the mean of its divisors is an integer number (435628127937).

Almost surely, 2^871256255873 is an apocalyptic number.

It is an amenable number.

871256255873 is a deficient number, since it is larger than the sum of its proper divisors (1).

871256255873 is an equidigital number, since it uses as much as digits as its factorization.

871256255873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224000, while the sum is 59.

The spelling of 871256255873 in words is "eight hundred seventy-one billion, two hundred fifty-six million, two hundred fifty-five thousand, eight hundred seventy-three".