71965608503687 has 2 divisors, whose sum is σ = 71965608503688. Its totient is φ = 71965608503686.

The previous prime is 71965608503557. The next prime is 71965608503707. The reversal of 71965608503687 is 78630580656917.

It is a strong prime.

It is an emirp because it is prime and its reverse (78630580656917) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71965608503687 - 2¹⁰ = 71965608502663 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71965608503687.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71965608503387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35982804251843 + 35982804251844.

It is an arithmetic number, because the mean of its divisors is an integer number (35982804251844).

Almost surely, 2^{71965608503687} is an apocalyptic number.

71965608503687 is a deficient number, since it is larger than the sum of its proper divisors (1).

71965608503687 is an equidigital number, since it uses as much as digits as its factorization.

71965608503687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 457228800, while the sum is 71.

The spelling of 71965608503687 in words is "seventy-one trillion, nine hundred sixty-five billion, six hundred eight million, five hundred three thousand, six hundred eighty-seven".