71208851513 has 2 divisors, whose sum is σ = 71208851514. Its totient is φ = 71208851512.

The previous prime is 71208851503. The next prime is 71208851551. The reversal of 71208851513 is 31515880217.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71177971264 + 30880249 = 266792^2 + 5557^2 .

It is an emirp because it is prime and its reverse (31515880217) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71208851513 - 2¹⁴ = 71208835129 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (71208851503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35604425756 + 35604425757.

It is an arithmetic number, because the mean of its divisors is an integer number (35604425757).

Almost surely, 2^71208851513 is an apocalyptic number.

It is an amenable number.

71208851513 is a deficient number, since it is larger than the sum of its proper divisors (1).

71208851513 is an equidigital number, since it uses as much as digits as its factorization.

71208851513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 67200, while the sum is 41.

The spelling of 71208851513 in words is "seventy-one billion, two hundred eight million, eight hundred fifty-one thousand, five hundred thirteen".