871616393261 has 32 divisors (see below), whose sum is σ = 907578000000. Its totient is φ = 836479365120.

The previous prime is 871616393243. The next prime is 871616393273. The reversal of 871616393261 is 162393616178.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-871616393261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871616393201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 581464490 + ... + 581465988.

It is an arithmetic number, because the mean of its divisors is an integer number (28361812500).

Almost surely, 2^871616393261 is an apocalyptic number.

It is an amenable number.

871616393261 is a deficient number, since it is larger than the sum of its proper divisors (35961606739).

871616393261 is a wasteful number, since it uses less digits than its factorization.

871616393261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2429.

The product of its digits is 1959552, while the sum is 53.

The spelling of 871616393261 in words is "eight hundred seventy-one billion, six hundred sixteen million, three hundred ninety-three thousand, two hundred sixty-one".