81040414999 has 2 divisors, whose sum is σ = 81040415000. Its totient is φ = 81040414998.

The previous prime is 81040414933. The next prime is 81040415023. The reversal of 81040414999 is 99941404018.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81040414999 - 2¹¹ = 81040412951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81040414699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40520207499 + 40520207500.

It is an arithmetic number, because the mean of its divisors is an integer number (40520207500).

Almost surely, 2^81040414999 is an apocalyptic number.

81040414999 is a deficient number, since it is larger than the sum of its proper divisors (1).

81040414999 is an equidigital number, since it uses as much as digits as its factorization.

81040414999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373248, while the sum is 49.

The spelling of 81040414999 in words is "eighty-one billion, forty million, four hundred fourteen thousand, nine hundred ninety-nine".