81043814004 has 48 divisors (see below), whose sum is σ = 195654950400. Its totient is φ = 26078806656.

The previous prime is 81043814003. The next prime is 81043814021. The reversal of 81043814004 is 40041834018.

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 15 ways as a sum of consecutive naturals, for example, 2653629 + ... + 2683995.

It is an arithmetic number, because the mean of its divisors is an integer number (4076144800).

Almost surely, 2^81043814004 is an apocalyptic number.

It is an amenable number.

81043814004 is an abundant number, since it is smaller than the sum of its proper divisors (114611136396).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81043814004 is a wasteful number, since it uses less digits than its factorization.

81043814004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38072 (or 38070 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

The spelling of 81043814004 in words is "eighty-one billion, forty-three million, eight hundred fourteen thousand, four".