71530207173 has 48 divisors (see below), whose sum is σ = 105400451520. Its totient is φ = 46738944000.

The previous prime is 71530207171. The next prime is 71530207183. The reversal of 71530207173 is 37170203517.

It is not a de Polignac number, because 71530207173 - 2¹ = 71530207171 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71530207171) 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 47 ways as a sum of consecutive naturals, for example, 62037765 + ... + 62038917.

It is an arithmetic number, because the mean of its divisors is an integer number (2195842740).

Almost surely, 2^71530207173 is an apocalyptic number.

It is an amenable number.

71530207173 is a deficient number, since it is larger than the sum of its proper divisors (33870244347).

71530207173 is a wasteful number, since it uses less digits than its factorization.

71530207173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1890 (or 1887 counting only the distinct ones).

The product of its (nonzero) digits is 30870, while the sum is 36.

The spelling of 71530207173 in words is "seventy-one billion, five hundred thirty million, two hundred seven thousand, one hundred seventy-three".