71712543831 has 16 divisors (see below), whose sum is σ = 98972344800. Its totient is φ = 46132502528.

The previous prime is 71712543829. The next prime is 71712543839. The reversal of 71712543831 is 13834521717.

It is a cyclic number.

It is not a de Polignac number, because 71712543831 - 2¹ = 71712543829 is a prime.

It is a super-2 number, since 2×71712543831² (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 (71712543839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95226 + ... + 390503.

It is an arithmetic number, because the mean of its divisors is an integer number (6185771550).

Almost surely, 2^71712543831 is an apocalyptic number.

71712543831 is a deficient number, since it is larger than the sum of its proper divisors (27259800969).

71712543831 is a wasteful number, since it uses less digits than its factorization.

71712543831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487458.

The product of its digits is 141120, while the sum is 42.

The spelling of 71712543831 in words is "seventy-one billion, seven hundred twelve million, five hundred forty-three thousand, eight hundred thirty-one".