71160581721265 has 4 divisors (see below), whose sum is σ = 85392698065524. Its totient is φ = 56928465377008.

The previous prime is 71160581721247. The next prime is 71160581721269. The reversal of 71160581721265 is 56212718506117.

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

It can be written as a sum of positive squares in 2 ways, for example, as 44399287031841 + 26761294689424 = 6663279^2 + 5173132^2 .

It is a cyclic number.

It is not a de Polignac number, because 71160581721265 - 2²³ = 71160573332657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71160581721269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7116058172122 + ... + 7116058172131.

It is an arithmetic number, because the mean of its divisors is an integer number (21348174516381).

Almost surely, 2^{71160581721265} is an apocalyptic number.

It is an amenable number.

71160581721265 is a deficient number, since it is larger than the sum of its proper divisors (14232116344259).

71160581721265 is a wasteful number, since it uses less digits than its factorization.

71160581721265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14232116344258.

The product of its (nonzero) digits is 1411200, while the sum is 52.

The spelling of 71160581721265 in words is "seventy-one trillion, one hundred sixty billion, five hundred eighty-one million, seven hundred twenty-one thousand, two hundred sixty-five".