71144535241 has 16 divisors (see below), whose sum is σ = 77398537104. Its totient is φ = 65003710464.

The previous prime is 71144535193. The next prime is 71144535353. The reversal of 71144535241 is 14253544117.

It can be written as a sum of positive squares in 8 ways, for example, as 12759961600 + 58384573641 = 112960^2 + 241629^2 .

It is a cyclic number.

It is not a de Polignac number, because 71144535241 - 2¹¹ = 71144533193 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71144535241.

It is not an unprimeable number, because it can be changed into a prime (71144505241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1080045 + ... + 1144021.

It is an arithmetic number, because the mean of its divisors is an integer number (4837408569).

Almost surely, 2^71144535241 is an apocalyptic number.

It is an amenable number.

71144535241 is a deficient number, since it is larger than the sum of its proper divisors (6254001863).

71144535241 is a wasteful number, since it uses less digits than its factorization.

71144535241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64860.

The product of its digits is 67200, while the sum is 37.

The spelling of 71144535241 in words is "seventy-one billion, one hundred forty-four million, five hundred thirty-five thousand, two hundred forty-one".