71681743605 has 32 divisors (see below), whose sum is σ = 115082553600. Its totient is φ = 38099814912.

The previous prime is 71681743591. The next prime is 71681743621. The reversal of 71681743605 is 50634718617.

It is not a de Polignac number, because 71681743605 - 2⁷ = 71681743477 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11504631 + ... + 11510859.

It is an arithmetic number, because the mean of its divisors is an integer number (3596329800).

Almost surely, 2^71681743605 is an apocalyptic number.

It is an amenable number.

71681743605 is a deficient number, since it is larger than the sum of its proper divisors (43400809995).

71681743605 is a wasteful number, since it uses less digits than its factorization.

71681743605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8733.

The product of its (nonzero) digits is 846720, while the sum is 48.

The spelling of 71681743605 in words is "seventy-one billion, six hundred eighty-one million, seven hundred forty-three thousand, six hundred five".