71765013897 has 6 divisors (see below), whose sum is σ = 103660575642. Its totient is φ = 47843342592.

The previous prime is 71765013889. The next prime is 71765013911. The reversal of 71765013897 is 79831056717.

71765013897 is a `hidden beast` number, since 7 + 17 + 6 + 501 + 38 + 97 = 666.

It can be written as a sum of positive squares in only one way, i.e., 38157324921 + 33607688976 = 195339^2 + 183324^2 .

It is not a de Polignac number, because 71765013897 - 2³ = 71765013889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71765013847) 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 5 ways as a sum of consecutive naturals, for example, 3986945208 + ... + 3986945225.

It is an arithmetic number, because the mean of its divisors is an integer number (17276762607).

Almost surely, 2^71765013897 is an apocalyptic number.

It is an amenable number.

71765013897 is a deficient number, since it is larger than the sum of its proper divisors (31895561745).

71765013897 is a wasteful number, since it uses less digits than its factorization.

71765013897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7973890439 (or 7973890436 counting only the distinct ones).

The product of its (nonzero) digits is 2222640, while the sum is 54.

The spelling of 71765013897 in words is "seventy-one billion, seven hundred sixty-five million, thirteen thousand, eight hundred ninety-seven".