81120341288924 has 48 divisors (see below), whose sum is σ = 169872423049728. Its totient is φ = 33140805411648.

The previous prime is 81120341288873. The next prime is 81120341288927. The reversal of 81120341288924 is 42988214302118.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81120341288927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 214765682 + ... + 215143065.

It is an arithmetic number, because the mean of its divisors is an integer number (3539008813536).

Almost surely, 2^{81120341288924} is an apocalyptic number.

It is an amenable number.

81120341288924 is an abundant number, since it is smaller than the sum of its proper divisors (88752081760804).

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

81120341288924 is a wasteful number, since it uses less digits than its factorization.

81120341288924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429909074 (or 429909072 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 53.

The spelling of 81120341288924 in words is "eighty-one trillion, one hundred twenty billion, three hundred forty-one million, two hundred eighty-eight thousand, nine hundred twenty-four".