83871871831 has 16 divisors (see below), whose sum is σ = 91660377600. Its totient is φ = 76110798400.

The previous prime is 83871871771. The next prime is 83871871841. The reversal of 83871871831 is 13817817838.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83871871831 is a prime.

It is a super-2 number, since 2×83871871831² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83871871841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28247715 + ... + 28250683.

It is an arithmetic number, because the mean of its divisors is an integer number (5728773600).

Almost surely, 2^83871871831 is an apocalyptic number.

83871871831 is a deficient number, since it is larger than the sum of its proper divisors (7788505769).

83871871831 is a wasteful number, since it uses less digits than its factorization.

83871871831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6710.

The product of its digits is 1806336, while the sum is 55.

The spelling of 83871871831 in words is "eighty-three billion, eight hundred seventy-one million, eight hundred seventy-one thousand, eight hundred thirty-one".