71247064799 has 2 divisors, whose sum is σ = 71247064800. Its totient is φ = 71247064798.

The previous prime is 71247064739. The next prime is 71247064807. The reversal of 71247064799 is 99746074217.

It is a strong prime.

It is an emirp because it is prime and its reverse (99746074217) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71247064799 is a prime.

It is a super-3 number, since 3×71247064799³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71247064739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35623532399 + 35623532400.

It is an arithmetic number, because the mean of its divisors is an integer number (35623532400).

Almost surely, 2^71247064799 is an apocalyptic number.

71247064799 is a deficient number, since it is larger than the sum of its proper divisors (1).

71247064799 is an equidigital number, since it uses as much as digits as its factorization.

71247064799 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5334336, while the sum is 56.

The spelling of 71247064799 in words is "seventy-one billion, two hundred forty-seven million, sixty-four thousand, seven hundred ninety-nine".