81104667438 has 16 divisors (see below), whose sum is σ = 162215773776. Its totient is φ = 27033816000.

The previous prime is 81104667437. The next prime is 81104667439. The reversal of 81104667438 is 83476640118.

It is an interprime number because it is at equal distance from previous prime (81104667437) and next prime (81104667439).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81104667437) 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 in 7 ways as a sum of consecutive naturals, for example, 96031 + ... + 414042.

It is an arithmetic number, because the mean of its divisors is an integer number (10138485861).

Almost surely, 2^81104667438 is an apocalyptic number.

81104667438 is an abundant number, since it is smaller than the sum of its proper divisors (81111106338).

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

81104667438 is a wasteful number, since it uses less digits than its factorization.

81104667438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536579.

The product of its (nonzero) digits is 774144, while the sum is 48.

The spelling of 81104667438 in words is "eighty-one billion, one hundred four million, six hundred sixty-seven thousand, four hundred thirty-eight".