71436874609 has 2 divisors, whose sum is σ = 71436874610. Its totient is φ = 71436874608.

The previous prime is 71436874591. The next prime is 71436874631. The reversal of 71436874609 is 90647863417.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54000464400 + 17436410209 = 232380^2 + 132047^2 .

It is an emirp because it is prime and its reverse (90647863417) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71436874609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71436874609.

It is not a weakly prime, because it can be changed into another prime (71436874699) 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, 35718437304 + 35718437305.

It is an arithmetic number, because the mean of its divisors is an integer number (35718437305).

Almost surely, 2^71436874609 is an apocalyptic number.

It is an amenable number.

71436874609 is a deficient number, since it is larger than the sum of its proper divisors (1).

71436874609 is an equidigital number, since it uses as much as digits as its factorization.

71436874609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6096384, while the sum is 55.

The spelling of 71436874609 in words is "seventy-one billion, four hundred thirty-six million, eight hundred seventy-four thousand, six hundred nine".