71788631533 has 2 divisors, whose sum is σ = 71788631534. Its totient is φ = 71788631532.

The previous prime is 71788631483. The next prime is 71788631549. The reversal of 71788631533 is 33513688717.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65156646564 + 6631984969 = 255258^2 + 81437^2 .

It is an emirp because it is prime and its reverse (33513688717) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71788631533 - 2²¹ = 71786534381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71788632533) 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, 35894315766 + 35894315767.

It is an arithmetic number, because the mean of its divisors is an integer number (35894315767).

Almost surely, 2^71788631533 is an apocalyptic number.

It is an amenable number.

71788631533 is a deficient number, since it is larger than the sum of its proper divisors (1).

71788631533 is an equidigital number, since it uses as much as digits as its factorization.

71788631533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2540160, while the sum is 52.

The spelling of 71788631533 in words is "seventy-one billion, seven hundred eighty-eight million, six hundred thirty-one thousand, five hundred thirty-three".