871416075773521 has 4 divisors (see below), whose sum is σ = 871522723202544. Its totient is φ = 871309428344500.

The previous prime is 871416075773513. The next prime is 871416075773531. The reversal of 871416075773521 is 125377570614178.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 871416075773521 - 2³ = 871416075773513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (871416075773531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53323702255 + ... + 53323718596.

It is an arithmetic number, because the mean of its divisors is an integer number (217880680800636).

Almost surely, 2^{871416075773521} is an apocalyptic number.

It is an amenable number.

871416075773521 is a deficient number, since it is larger than the sum of its proper divisors (106647429023).

871416075773521 is a wasteful number, since it uses less digits than its factorization.

871416075773521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106647429022.

The product of its (nonzero) digits is 69148800, while the sum is 64.

The spelling of 871416075773521 in words is "eight hundred seventy-one trillion, four hundred sixteen billion, seventy-five million, seven hundred seventy-three thousand, five hundred twenty-one".