71140321881 has 6 divisors (see below), whose sum is σ = 102758242730. Its totient is φ = 47426881248.

The previous prime is 71140321877. The next prime is 71140321897. The reversal of 71140321881 is 18812304117.

71140321881 is a `hidden beast` number, since 71 + 1 + 403 + 2 + 188 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 46171265625 + 24969056256 = 214875^2 + 158016^2 .

It is not a de Polignac number, because 71140321881 - 2² = 71140321877 is a prime.

It is a super-2 number, since 2×71140321881² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71140321831) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3952240096 + ... + 3952240113.

Almost surely, 2^71140321881 is an apocalyptic number.

It is an amenable number.

71140321881 is a deficient number, since it is larger than the sum of its proper divisors (31617920849).

71140321881 is a wasteful number, since it uses less digits than its factorization.

71140321881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7904480215 (or 7904480212 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 36.

Adding to 71140321881 its reverse (18812304117), we get a palindrome (89952625998).

The spelling of 71140321881 in words is "seventy-one billion, one hundred forty million, three hundred twenty-one thousand, eight hundred eighty-one".