71863986161 has 12 divisors (see below), whose sum is σ = 79026508176. Its totient is φ = 65301523320.

The previous prime is 71863986143. The next prime is 71863986211. The reversal of 71863986161 is 16168936817.

It is not a de Polignac number, because 71863986161 - 2²⁶ = 71796877297 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71863986097 and 71863986106.

It is not an unprimeable number, because it can be changed into a prime (71863986461) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 139010 + ... + 403796.

It is an arithmetic number, because the mean of its divisors is an integer number (6585542348).

Almost surely, 2^71863986161 is an apocalyptic number.

It is an amenable number.

71863986161 is a deficient number, since it is larger than the sum of its proper divisors (7162522015).

71863986161 is a wasteful number, since it uses less digits than its factorization.

71863986161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267052 (or 267041 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 56.

The spelling of 71863986161 in words is "seventy-one billion, eight hundred sixty-three million, nine hundred eighty-six thousand, one hundred sixty-one".