81116414157888 has 42 divisors (see below), whose sum is σ = 232505555166014. Its totient is φ = 27038804719104.

The previous prime is 81116414157833. The next prime is 81116414157893. The reversal of 81116414157888 is 88875141461118.

81116414157888 is a `hidden beast` number, since 8 + 1 + 1 + 16 + 4 + 1 + 41 + 578 + 8 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 80584518164544 + 531895993344 = 8976888^2 + 729312^2 .

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 70413553381 + ... + 70413554532.

Almost surely, 2^{81116414157888} is an apocalyptic number.

It is an amenable number.

81116414157888 is an abundant number, since it is smaller than the sum of its proper divisors (151389141008126).

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

81116414157888 is a wasteful number, since it uses less digits than its factorization.

81116414157888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140827107931 (or 140827107918 counting only the distinct ones).

The product of its digits is 13762560, while the sum is 63.

The spelling of 81116414157888 in words is "eighty-one trillion, one hundred sixteen billion, four hundred fourteen million, one hundred fifty-seven thousand, eight hundred eighty-eight".