71481597211 has 4 divisors (see below), whose sum is σ = 71954985424. Its totient is φ = 71008209000.

The previous prime is 71481597203. The next prime is 71481597233. The reversal of 71481597211 is 11279518417.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71481597211 - 2³ = 71481597203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71481597611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236693880 + ... + 236694181.

It is an arithmetic number, because the mean of its divisors is an integer number (17988746356).

Almost surely, 2^71481597211 is an apocalyptic number.

71481597211 is a deficient number, since it is larger than the sum of its proper divisors (473388213).

71481597211 is a wasteful number, since it uses less digits than its factorization.

71481597211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473388212.

The product of its digits is 141120, while the sum is 46.

The spelling of 71481597211 in words is "seventy-one billion, four hundred eighty-one million, five hundred ninety-seven thousand, two hundred eleven".