71226535689 has 27 divisors (see below), whose sum is σ = 109311586293. Its totient is φ = 44682619392.

The previous prime is 71226535687. The next prime is 71226535691. The reversal of 71226535689 is 98653562217.

The square root of 71226535689 is 266883.

It is a perfect power (a square), and thus also a powerful number.

71226535689 is a `hidden beast` number, since 7 + 1 + 2 + 26 + 53 + 568 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (71226535687) and next prime (71226535691).

It can be written as a sum of positive squares in 4 ways, for example, as 42800575689 + 28425960000 = 206883^2 + 168600^2 .

It is not a de Polignac number, because 71226535689 - 2¹ = 71226535687 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71226535687) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 13608417 + ... + 13613649.

Almost surely, 2^71226535689 is an apocalyptic number.

71226535689 is the 266883-rd square number.

71226535689 is the 133442-nd centered octagonal number.

It is an amenable number.

71226535689 is a deficient number, since it is larger than the sum of its proper divisors (38085050604).

71226535689 is an frugal number, since it uses more digits than its factorization.

71226535689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10506 (or 5253 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 54.

The spelling of 71226535689 in words is "seventy-one billion, two hundred twenty-six million, five hundred thirty-five thousand, six hundred eighty-nine".