71231075361 has 12 divisors (see below), whose sum is σ = 102893529492. Its totient is φ = 47485445856.

The previous prime is 71231075359. The next prime is 71231075401. The reversal of 71231075361 is 16357013217.

71231075361 is a `hidden beast` number, since 7 + 12 + 3 + 107 + 536 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 28276440336 + 42954635025 = 168156^2 + 207255^2 .

It is not a de Polignac number, because 71231075361 - 2¹ = 71231075359 is a prime.

It is a super-2 number, since 2×71231075361² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71231075761) 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 11 ways as a sum of consecutive naturals, for example, 92335 + ... + 388571.

It is an arithmetic number, because the mean of its divisors is an integer number (8574460791).

Almost surely, 2^71231075361 is an apocalyptic number.

It is an amenable number.

71231075361 is a deficient number, since it is larger than the sum of its proper divisors (31662454131).

71231075361 is a wasteful number, since it uses less digits than its factorization.

71231075361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322960 (or 322957 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 36.

Adding to 71231075361 its reverse (16357013217), we get a palindrome (87588088578).

The spelling of 71231075361 in words is "seventy-one billion, two hundred thirty-one million, seventy-five thousand, three hundred sixty-one".