71775056489 has 2 divisors, whose sum is σ = 71775056490. Its totient is φ = 71775056488.

The previous prime is 71775056473. The next prime is 71775056539. The reversal of 71775056489 is 98465057717.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57424933225 + 14350123264 = 239635^2 + 119792^2 .

It is a cyclic number.

It is not a de Polignac number, because 71775056489 - 2⁴ = 71775056473 is a prime.

It is not a weakly prime, because it can be changed into another prime (71775056429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35887528244 + 35887528245.

It is an arithmetic number, because the mean of its divisors is an integer number (35887528245).

Almost surely, 2^71775056489 is an apocalyptic number.

It is an amenable number.

71775056489 is a deficient number, since it is larger than the sum of its proper divisors (1).

71775056489 is an equidigital number, since it uses as much as digits as its factorization.

71775056489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14817600, while the sum is 59.

The spelling of 71775056489 in words is "seventy-one billion, seven hundred seventy-five million, fifty-six thousand, four hundred eighty-nine".