71121673172 has 48 divisors (see below), whose sum is σ = 136354143744. Its totient is φ = 32191020000.

The previous prime is 71121673169. The next prime is 71121673199. The reversal of 71121673172 is 27137612117.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 17554547 + ... + 17558597.

It is an arithmetic number, because the mean of its divisors is an integer number (2840711328).

Almost surely, 2^71121673172 is an apocalyptic number.

It is an amenable number.

71121673172 is a deficient number, since it is larger than the sum of its proper divisors (65232470572).

71121673172 is a wasteful number, since it uses less digits than its factorization.

71121673172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5660 (or 5658 counting only the distinct ones).

The product of its digits is 24696, while the sum is 38.

The spelling of 71121673172 in words is "seventy-one billion, one hundred twenty-one million, six hundred seventy-three thousand, one hundred seventy-two".