81040338003 has 8 divisors (see below), whose sum is σ = 108055158208. Its totient is φ = 54026204904.

The previous prime is 81040337999. The next prime is 81040338007. The reversal of 81040338003 is 30083304018.

It is an interprime number because it is at equal distance from previous prime (81040337999) and next prime (81040338007).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 81040338003 - 2² = 81040337999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81040338007) 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 in 7 ways as a sum of consecutive naturals, for example, 254676 + ... + 476382.

It is an arithmetic number, because the mean of its divisors is an integer number (13506894776).

Almost surely, 2^81040338003 is an apocalyptic number.

81040338003 is a deficient number, since it is larger than the sum of its proper divisors (27014820205).

81040338003 is a wasteful number, since it uses less digits than its factorization.

81040338003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343553.

The product of its (nonzero) digits is 6912, while the sum is 30.

The spelling of 81040338003 in words is "eighty-one billion, forty million, three hundred thirty-eight thousand, three".