71538061156 has 9 divisors (see below), whose sum is σ = 125192543161. Its totient is φ = 35768763112.

The previous prime is 71538061151. The next prime is 71538061171. The reversal of 71538061156 is 65116083517.

The square root of 71538061156 is 267466.

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

It can be written as a sum of positive squares in only one way, i.e., 34897976100 + 36640085056 = 186810^2 + 191416^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71538061151) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 468066 + ... + 601798.

Almost surely, 2^71538061156 is an apocalyptic number.

71538061156 is the 267466-th square number.

It is an amenable number.

71538061156 is a deficient number, since it is larger than the sum of its proper divisors (53654482005).

71538061156 is an frugal number, since it uses more digits than its factorization.

71538061156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267470 (or 133735 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 43.

The spelling of 71538061156 in words is "seventy-one billion, five hundred thirty-eight million, sixty-one thousand, one hundred fifty-six".