81408002147 has 2 divisors, whose sum is σ = 81408002148. Its totient is φ = 81408002146.

The previous prime is 81408002141. The next prime is 81408002171. The reversal of 81408002147 is 74120080418.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81408002147 - 2⁴ = 81408002131 is a prime.

It is not a weakly prime, because it can be changed into another prime (81408002141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40704001073 + 40704001074.

It is an arithmetic number, because the mean of its divisors is an integer number (40704001074).

Almost surely, 2^81408002147 is an apocalyptic number.

81408002147 is a deficient number, since it is larger than the sum of its proper divisors (1).

81408002147 is an equidigital number, since it uses as much as digits as its factorization.

81408002147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14336, while the sum is 35.

The spelling of 81408002147 in words is "eighty-one billion, four hundred eight million, two thousand, one hundred forty-seven".