71561800276013 has 2 divisors, whose sum is σ = 71561800276014. Its totient is φ = 71561800276012.

The previous prime is 71561800276007. The next prime is 71561800276033. The reversal of 71561800276013 is 31067200816517.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70563393640804 + 998406635209 = 8400202^2 + 999203^2 .

It is an emirp because it is prime and its reverse (31067200816517) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71561800276013 - 2⁴ = 71561800275997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71561800276033) 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, 35780900138006 + 35780900138007.

It is an arithmetic number, because the mean of its divisors is an integer number (35780900138007).

Almost surely, 2^{71561800276013} is an apocalyptic number.

It is an amenable number.

71561800276013 is a deficient number, since it is larger than the sum of its proper divisors (1).

71561800276013 is an equidigital number, since it uses as much as digits as its factorization.

71561800276013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 423360, while the sum is 47.

The spelling of 71561800276013 in words is "seventy-one trillion, five hundred sixty-one billion, eight hundred million, two hundred seventy-six thousand, thirteen".