71443001573 has 2 divisors, whose sum is σ = 71443001574. Its totient is φ = 71443001572.

The previous prime is 71443001569. The next prime is 71443001587. The reversal of 71443001573 is 37510034417.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44025271684 + 27417729889 = 209822^2 + 165583^2 .

It is a cyclic number.

It is not a de Polignac number, because 71443001573 - 2² = 71443001569 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71443001473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35721500786 + 35721500787.

It is an arithmetic number, because the mean of its divisors is an integer number (35721500787).

Almost surely, 2^71443001573 is an apocalyptic number.

It is an amenable number.

71443001573 is a deficient number, since it is larger than the sum of its proper divisors (1).

71443001573 is an equidigital number, since it uses as much as digits as its factorization.

71443001573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 35.

The spelling of 71443001573 in words is "seventy-one billion, four hundred forty-three million, one thousand, five hundred seventy-three".