81118977183404 has 24 divisors (see below), whose sum is σ = 144433941004080. Its totient is φ = 39857728610304.

The previous prime is 81118977183403. The next prime is 81118977183527. The reversal of 81118977183404 is 40438177981118.

It is not an unprimeable number, because it can be changed into a prime (81118977183403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 698906069 + ... + 699022124.

It is an arithmetic number, because the mean of its divisors is an integer number (6018080875170).

Almost surely, 2^{81118977183404} is an apocalyptic number.

It is an amenable number.

81118977183404 is a deficient number, since it is larger than the sum of its proper divisors (63314963820676).

81118977183404 is a wasteful number, since it uses less digits than its factorization.

81118977183404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397928449 (or 1397928447 counting only the distinct ones).

The product of its (nonzero) digits is 10838016, while the sum is 62.

The spelling of 81118977183404 in words is "eighty-one trillion, one hundred eighteen billion, nine hundred seventy-seven million, one hundred eighty-three thousand, four hundred four".