71272515841 has 2 divisors, whose sum is σ = 71272515842. Its totient is φ = 71272515840.

The previous prime is 71272515767. The next prime is 71272515857. The reversal of 71272515841 is 14851527217.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51040298241 + 20232217600 = 225921^2 + 142240^2 .

It is a cyclic number.

It is not a de Polignac number, because 71272515841 - 2⁹ = 71272515329 is a prime.

It is not a weakly prime, because it can be changed into another prime (71272515241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35636257920 + 35636257921.

It is an arithmetic number, because the mean of its divisors is an integer number (35636257921).

Almost surely, 2^71272515841 is an apocalyptic number.

It is an amenable number.

71272515841 is a deficient number, since it is larger than the sum of its proper divisors (1).

71272515841 is an equidigital number, since it uses as much as digits as its factorization.

71272515841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 156800, while the sum is 43.

The spelling of 71272515841 in words is "seventy-one billion, two hundred seventy-two million, five hundred fifteen thousand, eight hundred forty-one".