81675429263 has 2 divisors, whose sum is σ = 81675429264. Its totient is φ = 81675429262.

The previous prime is 81675429203. The next prime is 81675429287. The reversal of 81675429263 is 36292457618.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81675429263 - 2¹⁰ = 81675428239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81675429203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40837714631 + 40837714632.

It is an arithmetic number, because the mean of its divisors is an integer number (40837714632).

Almost surely, 2^81675429263 is an apocalyptic number.

81675429263 is a deficient number, since it is larger than the sum of its proper divisors (1).

81675429263 is an equidigital number, since it uses as much as digits as its factorization.

81675429263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4354560, while the sum is 53.

The spelling of 81675429263 in words is "eighty-one billion, six hundred seventy-five million, four hundred twenty-nine thousand, two hundred sixty-three".