71541050909 has 2 divisors, whose sum is σ = 71541050910. Its totient is φ = 71541050908.

The previous prime is 71541050891. The next prime is 71541050923. The reversal of 71541050909 is 90905014517.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69445425625 + 2095625284 = 263525^2 + 45778^2 .

It is a cyclic number.

It is not a de Polignac number, because 71541050909 - 2²⁰ = 71540002333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71541050969) 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 as a sum of consecutive naturals, namely, 35770525454 + 35770525455.

It is an arithmetic number, because the mean of its divisors is an integer number (35770525455).

Almost surely, 2^71541050909 is an apocalyptic number.

It is an amenable number.

71541050909 is a deficient number, since it is larger than the sum of its proper divisors (1).

71541050909 is an equidigital number, since it uses as much as digits as its factorization.

71541050909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56700, while the sum is 41.

The spelling of 71541050909 in words is "seventy-one billion, five hundred forty-one million, fifty thousand, nine hundred nine".