71605168625 has 32 divisors (see below), whose sum is σ = 90947525760. Its totient is φ = 56276337600.

The previous prime is 71605168589. The next prime is 71605168637. The reversal of 71605168625 is 52686150617.

It is a de Polignac number, because none of the positive numbers 2^k-71605168625 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 71605168625.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1837847 + ... + 1876403.

It is an arithmetic number, because the mean of its divisors is an integer number (2842110180).

Almost surely, 2^71605168625 is an apocalyptic number.

It is an amenable number.

71605168625 is a deficient number, since it is larger than the sum of its proper divisors (19342357135).

71605168625 is a wasteful number, since it uses less digits than its factorization.

71605168625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38834 (or 38824 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 47.

The spelling of 71605168625 in words is "seventy-one billion, six hundred five million, one hundred sixty-eight thousand, six hundred twenty-five".