71681211041 has 4 divisors (see below), whose sum is σ = 78197684784. Its totient is φ = 65164737300.

The previous prime is 71681211037. The next prime is 71681211089. The reversal of 71681211041 is 14011218617.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 71681211041 - 2² = 71681211037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71681210989 and 71681211007.

It is not an unprimeable number, because it can be changed into a prime (71681211241) 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, 3258236855 + ... + 3258236876.

It is an arithmetic number, because the mean of its divisors is an integer number (19549421196).

Almost surely, 2^71681211041 is an apocalyptic number.

It is an amenable number.

71681211041 is a deficient number, since it is larger than the sum of its proper divisors (6516473743).

71681211041 is a wasteful number, since it uses less digits than its factorization.

71681211041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6516473742.

The product of its (nonzero) digits is 2688, while the sum is 32.

Adding to 71681211041 its reverse (14011218617), we get a palindrome (85692429658).

The spelling of 71681211041 in words is "seventy-one billion, six hundred eighty-one million, two hundred eleven thousand, forty-one".