71788687671 has 8 divisors (see below), whose sum is σ = 95719562224. Its totient is φ = 47858469120.

The previous prime is 71788687669. The next prime is 71788687679. The reversal of 71788687671 is 17678688717.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71788687671 - 2¹ = 71788687669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71788687679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219381 + ... + 437841.

It is an arithmetic number, because the mean of its divisors is an integer number (11964945278).

Almost surely, 2^71788687671 is an apocalyptic number.

71788687671 is a deficient number, since it is larger than the sum of its proper divisors (23930874553).

71788687671 is a wasteful number, since it uses less digits than its factorization.

71788687671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328001.

The product of its digits is 44255232, while the sum is 66.

The spelling of 71788687671 in words is "seventy-one billion, seven hundred eighty-eight million, six hundred eighty-seven thousand, six hundred seventy-one".