71055881117 has 8 divisors (see below), whose sum is σ = 76597272024. Its totient is φ = 65525283648.

The previous prime is 71055881101. The next prime is 71055881137. The reversal of 71055881117 is 71118855017.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1816379161 + 69239501956 = 42619^2 + 263134^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71055881117 - 2⁴ = 71055881101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71055881137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2684678 + ... + 2711015.

It is an arithmetic number, because the mean of its divisors is an integer number (9574659003).

Almost surely, 2^71055881117 is an apocalyptic number.

It is an amenable number.

71055881117 is a deficient number, since it is larger than the sum of its proper divisors (5541390907).

71055881117 is a wasteful number, since it uses less digits than its factorization.

71055881117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5396719.

The product of its (nonzero) digits is 78400, while the sum is 44.

The spelling of 71055881117 in words is "seventy-one billion, fifty-five million, eight hundred eighty-one thousand, one hundred seventeen".