871662668204031 has 64 divisors (see below), whose sum is σ = 1289602043996160. Its totient is φ = 519239412720000.

The previous prime is 871662668204021. The next prime is 871662668204077. The reversal of 871662668204031 is 130402866266178.

It is a happy number.

It is not a de Polignac number, because 871662668204031 - 2⁷ = 871662668203903 is a prime.

It is a super-2 number, since 2×871662668204031² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871662668204021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 29200436256 + ... + 29200466106.

It is an arithmetic number, because the mean of its divisors is an integer number (20150031937440).

Almost surely, 2^{871662668204031} is an apocalyptic number.

871662668204031 is a deficient number, since it is larger than the sum of its proper divisors (417939375792129).

871662668204031 is a wasteful number, since it uses less digits than its factorization.

871662668204031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40068.

The product of its (nonzero) digits is 27869184, while the sum is 60.

The spelling of 871662668204031 in words is "eight hundred seventy-one trillion, six hundred sixty-two billion, six hundred sixty-eight million, two hundred four thousand, thirty-one".