71471448657 has 24 divisors (see below), whose sum is σ = 123170752800. Its totient is φ = 40840827048.

The previous prime is 71471448641. The next prime is 71471448679. The reversal of 71471448657 is 75684417417.

71471448657 is a `hidden beast` number, since 7 + 1 + 471 + 44 + 86 + 57 = 666.

It is not a de Polignac number, because 71471448657 - 2⁴ = 71471448641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71471448457) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 27009807 + ... + 27012452.

It is an arithmetic number, because the mean of its divisors is an integer number (5132114700).

Almost surely, 2^71471448657 is an apocalyptic number.

It is an amenable number.

71471448657 is a deficient number, since it is larger than the sum of its proper divisors (51699304143).

71471448657 is a wasteful number, since it uses less digits than its factorization.

71471448657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54022282 (or 54022269 counting only the distinct ones).

The product of its digits is 5268480, while the sum is 54.

The spelling of 71471448657 in words is "seventy-one billion, four hundred seventy-one million, four hundred forty-eight thousand, six hundred fifty-seven".