9871092061871 has 4 divisors (see below), whose sum is σ = 9968825646744. Its totient is φ = 9773358477000.

The previous prime is 9871092061867. The next prime is 9871092061879. The reversal of 9871092061871 is 1781602901789.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9871092061871 - 2² = 9871092061867 is a prime.

It is a super-3 number, since 3×9871092061871³ (a number of 40 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9871092061871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9871092061879) 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, 48866792285 + ... + 48866792486.

It is an arithmetic number, because the mean of its divisors is an integer number (2492206411686).

Almost surely, 2^{9871092061871} is an apocalyptic number.

9871092061871 is a deficient number, since it is larger than the sum of its proper divisors (97733584873).

9871092061871 is a wasteful number, since it uses less digits than its factorization.

9871092061871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97733584872.

The product of its (nonzero) digits is 3048192, while the sum is 59.

The spelling of 9871092061871 in words is "nine trillion, eight hundred seventy-one billion, ninety-two million, sixty-one thousand, eight hundred seventy-one".