71712031005 has 48 divisors (see below), whose sum is σ = 131642881344. Its totient is φ = 35988364800.

The previous prime is 71712030967. The next prime is 71712031043. The reversal of 71712031005 is 50013021717.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (71712030967) and next prime (71712031043).

It is not a de Polignac number, because 71712031005 - 2⁶ = 71712030941 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71712031005.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 4633530 + ... + 4648980.

It is an arithmetic number, because the mean of its divisors is an integer number (2742560028).

Almost surely, 2^71712031005 is an apocalyptic number.

It is an amenable number.

71712031005 is a deficient number, since it is larger than the sum of its proper divisors (59930850339).

71712031005 is a wasteful number, since it uses less digits than its factorization.

71712031005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21546 (or 21543 counting only the distinct ones).

The product of its (nonzero) digits is 1470, while the sum is 27.

The spelling of 71712031005 in words is "seventy-one billion, seven hundred twelve million, thirty-one thousand, five".