81134249363 has 2 divisors, whose sum is σ = 81134249364. Its totient is φ = 81134249362.

The previous prime is 81134249327. The next prime is 81134249447. The reversal of 81134249363 is 36394243118.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81134249363 - 2⁸ = 81134249107 is a prime.

It is not a weakly prime, because it can be changed into another prime (81134249323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40567124681 + 40567124682.

It is an arithmetic number, because the mean of its divisors is an integer number (40567124682).

Almost surely, 2^81134249363 is an apocalyptic number.

81134249363 is a deficient number, since it is larger than the sum of its proper divisors (1).

81134249363 is an equidigital number, since it uses as much as digits as its factorization.

81134249363 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 44.

The spelling of 81134249363 in words is "eighty-one billion, one hundred thirty-four million, two hundred forty-nine thousand, three hundred sixty-three".