71676315649 has 2 divisors, whose sum is σ = 71676315650. Its totient is φ = 71676315648.

The previous prime is 71676315631. The next prime is 71676315713. The reversal of 71676315649 is 94651367617.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67929039424 + 3747276225 = 260632^2 + 61215^2 .

It is a cyclic number.

It is not a de Polignac number, because 71676315649 - 2¹¹ = 71676313601 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71676315649.

It is not a weakly prime, because it can be changed into another prime (71676312649) 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, 35838157824 + 35838157825.

It is an arithmetic number, because the mean of its divisors is an integer number (35838157825).

Almost surely, 2^71676315649 is an apocalyptic number.

It is an amenable number.

71676315649 is a deficient number, since it is larger than the sum of its proper divisors (1).

71676315649 is an equidigital number, since it uses as much as digits as its factorization.

71676315649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5715360, while the sum is 55.

The spelling of 71676315649 in words is "seventy-one billion, six hundred seventy-six million, three hundred fifteen thousand, six hundred forty-nine".