71121713571 has 12 divisors (see below), whose sum is σ = 104264668872. Its totient is φ = 46706796576.

The previous prime is 71121713567. The next prime is 71121713633. The reversal of 71121713571 is 17531712117.

It is a happy number.

71121713571 is a `hidden beast` number, since 7 + 1 + 12 + 1 + 71 + 3 + 571 = 666.

It is not a de Polignac number, because 71121713571 - 2² = 71121713567 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71121713771) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 58972626 + ... + 58973831.

It is an arithmetic number, because the mean of its divisors is an integer number (8688722406).

Almost surely, 2^71121713571 is an apocalyptic number.

71121713571 is a deficient number, since it is larger than the sum of its proper divisors (33142955301).

71121713571 is a wasteful number, since it uses less digits than its factorization.

71121713571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117946530 (or 117946527 counting only the distinct ones).

The product of its digits is 10290, while the sum is 36.

The spelling of 71121713571 in words is "seventy-one billion, one hundred twenty-one million, seven hundred thirteen thousand, five hundred seventy-one".