71967974517 has 6 divisors (see below), whose sum is σ = 103953740982. Its totient is φ = 47978649672.

The previous prime is 71967974509. The next prime is 71967974543. The reversal of 71967974517 is 71547976917.

71967974517 is a `hidden beast` number, since 7 + 1 + 96 + 7 + 97 + 451 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 45571148676 + 26396825841 = 213474^2 + 162471^2 .

It is not a de Polignac number, because 71967974517 - 2³ = 71967974509 is a prime.

It is a super-2 number, since 2×71967974517² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71967974557) 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 5 ways as a sum of consecutive naturals, for example, 3998220798 + ... + 3998220815.

It is an arithmetic number, because the mean of its divisors is an integer number (17325623497).

Almost surely, 2^71967974517 is an apocalyptic number.

It is an amenable number.

71967974517 is a deficient number, since it is larger than the sum of its proper divisors (31985766465).

71967974517 is a wasteful number, since it uses less digits than its factorization.

71967974517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7996441619 (or 7996441616 counting only the distinct ones).

The product of its digits is 23337720, while the sum is 63.

The spelling of 71967974517 in words is "seventy-one billion, nine hundred sixty-seven million, nine hundred seventy-four thousand, five hundred seventeen".