71055261449 has 2 divisors, whose sum is σ = 71055261450. Its totient is φ = 71055261448.

The previous prime is 71055261373. The next prime is 71055261461. The reversal of 71055261449 is 94416255017.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68713185424 + 2342076025 = 262132^2 + 48395^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71055261449 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 (71055261469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35527630724 + 35527630725.

It is an arithmetic number, because the mean of its divisors is an integer number (35527630725).

Almost surely, 2^71055261449 is an apocalyptic number.

It is an amenable number.

71055261449 is a deficient number, since it is larger than the sum of its proper divisors (1).

71055261449 is an equidigital number, since it uses as much as digits as its factorization.

71055261449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 302400, while the sum is 44.

The spelling of 71055261449 in words is "seventy-one billion, fifty-five million, two hundred sixty-one thousand, four hundred forty-nine".