81043814005 has 64 divisors (see below), whose sum is σ = 127912550400. Its totient is φ = 47756459520.

The previous prime is 81043814003. The next prime is 81043814021. The reversal of 81043814005 is 50041834018.

It is not a de Polignac number, because 81043814005 - 2¹ = 81043814003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81043814003) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3374881 + ... + 3398809.

It is an arithmetic number, because the mean of its divisors is an integer number (1998633600).

Almost surely, 2^81043814005 is an apocalyptic number.

It is an amenable number.

81043814005 is a deficient number, since it is larger than the sum of its proper divisors (46868736395).

81043814005 is a wasteful number, since it uses less digits than its factorization.

81043814005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24434.

The product of its (nonzero) digits is 15360, while the sum is 34.

The spelling of 81043814005 in words is "eighty-one billion, forty-three million, eight hundred fourteen thousand, five".