71550509089 has 2 divisors, whose sum is σ = 71550509090. Its totient is φ = 71550509088.

The previous prime is 71550509083. The next prime is 71550509131. The reversal of 71550509089 is 98090505517.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43521052689 + 28029456400 = 208617^2 + 167420^2 .

It is an emirp because it is prime and its reverse (98090505517) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71550509089 - 2¹⁵ = 71550476321 is a prime.

It is not a weakly prime, because it can be changed into another prime (71550509083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35775254544 + 35775254545.

It is an arithmetic number, because the mean of its divisors is an integer number (35775254545).

Almost surely, 2^71550509089 is an apocalyptic number.

It is an amenable number.

71550509089 is a deficient number, since it is larger than the sum of its proper divisors (1).

71550509089 is an equidigital number, since it uses as much as digits as its factorization.

71550509089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 567000, while the sum is 49.

The spelling of 71550509089 in words is "seventy-one billion, five hundred fifty million, five hundred nine thousand, eighty-nine".