81033410113 has 2 divisors, whose sum is σ = 81033410114. Its totient is φ = 81033410112.

The previous prime is 81033410053. The next prime is 81033410131. The reversal of 81033410113 is 31101433018.

Together with next prime (81033410131) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71199316224 + 9834093889 = 266832^2 + 99167^2 .

It is a cyclic number.

It is not a de Polignac number, because 81033410113 - 2¹³ = 81033401921 is a prime.

It is not a weakly prime, because it can be changed into another prime (81033410153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40516705056 + 40516705057.

It is an arithmetic number, because the mean of its divisors is an integer number (40516705057).

Almost surely, 2^81033410113 is an apocalyptic number.

It is an amenable number.

81033410113 is a deficient number, since it is larger than the sum of its proper divisors (1).

81033410113 is an equidigital number, since it uses as much as digits as its factorization.

81033410113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The spelling of 81033410113 in words is "eighty-one billion, thirty-three million, four hundred ten thousand, one hundred thirteen".