81184078045860 has 96 divisors (see below), whose sum is σ = 244844025000960. Its totient is φ = 20032692930432.

The previous prime is 81184078045831. The next prime is 81184078045877. The reversal of 81184078045860 is 6854087048118.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a junction number, because it is equal to n+sod(n) for n = 81184078045794 and 81184078045803.

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 31 ways as a sum of consecutive naturals, for example, 828021952 + ... + 828119991.

It is an arithmetic number, because the mean of its divisors is an integer number (2550458593760).

Almost surely, 2^{81184078045860} is an apocalyptic number.

It is an amenable number.

81184078045860 is an abundant number, since it is smaller than the sum of its proper divisors (163659946955100).

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

81184078045860 is a wasteful number, since it uses less digits than its factorization.

81184078045860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1656142017 (or 1656142015 counting only the distinct ones).

The product of its (nonzero) digits is 13762560, while the sum is 60.

The spelling of 81184078045860 in words is "eighty-one trillion, one hundred eighty-four billion, seventy-eight million, forty-five thousand, eight hundred sixty".