71282073581 has 2 divisors, whose sum is σ = 71282073582. Its totient is φ = 71282073580.

The previous prime is 71282073571. The next prime is 71282073613. The reversal of 71282073581 is 18537028217.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70193733481 + 1088340100 = 264941^2 + 32990^2 .

It is an emirp because it is prime and its reverse (18537028217) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71282073581 - 2⁶ = 71282073517 is a prime.

It is a super-2 number, since 2×71282073581² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71282073571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35641036790 + 35641036791.

It is an arithmetic number, because the mean of its divisors is an integer number (35641036791).

Almost surely, 2^71282073581 is an apocalyptic number.

It is an amenable number.

71282073581 is a deficient number, since it is larger than the sum of its proper divisors (1).

71282073581 is an equidigital number, since it uses as much as digits as its factorization.

71282073581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 188160, while the sum is 44.

The spelling of 71282073581 in words is "seventy-one billion, two hundred eighty-two million, seventy-three thousand, five hundred eighty-one".