71705500172 has 24 divisors (see below), whose sum is σ = 126653113776. Its totient is φ = 35520285888.

The previous prime is 71705500171. The next prime is 71705500193. The reversal of 71705500172 is 27100550717.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (71705500171) 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 7 ways as a sum of consecutive naturals, for example, 33218 + ... + 380150.

It is an arithmetic number, because the mean of its divisors is an integer number (5277213074).

Almost surely, 2^71705500172 is an apocalyptic number.

It is an amenable number.

71705500172 is a deficient number, since it is larger than the sum of its proper divisors (54947613604).

71705500172 is a wasteful number, since it uses less digits than its factorization.

71705500172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347417 (or 347415 counting only the distinct ones).

The product of its (nonzero) digits is 17150, while the sum is 35.

The spelling of 71705500172 in words is "seventy-one billion, seven hundred five million, five hundred thousand, one hundred seventy-two".