81437846059 has 2 divisors, whose sum is σ = 81437846060. Its totient is φ = 81437846058.

The previous prime is 81437846051. The next prime is 81437846093. The reversal of 81437846059 is 95064873418.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81437846059 - 2³ = 81437846051 is a prime.

It is not a weakly prime, because it can be changed into another prime (81437846051) 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, 40718923029 + 40718923030.

It is an arithmetic number, because the mean of its divisors is an integer number (40718923030).

Almost surely, 2^81437846059 is an apocalyptic number.

81437846059 is a deficient number, since it is larger than the sum of its proper divisors (1).

81437846059 is an equidigital number, since it uses as much as digits as its factorization.

81437846059 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5806080, while the sum is 55.

The spelling of 81437846059 in words is "eighty-one billion, four hundred thirty-seven million, eight hundred forty-six thousand, fifty-nine".