819416081 has 8 divisors (see below), whose sum is σ = 895869984. Its totient is φ = 743289120.

The previous prime is 819416077. The next prime is 819416107. The reversal of 819416081 is 180614918.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 819416081 - 2² = 819416077 is a prime.

It is a super-2 number, since 2×819416081² = 1342885427602797122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (819416071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76475 + ... + 86528.

It is an arithmetic number, because the mean of its divisors is an integer number (111983748).

Almost surely, 2^819416081 is an apocalyptic number.

It is an amenable number.

819416081 is a deficient number, since it is larger than the sum of its proper divisors (76453903).

819416081 is a wasteful number, since it uses less digits than its factorization.

819416081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163471.

The product of its (nonzero) digits is 13824, while the sum is 38.

The square root of 819416081 is about 28625.4446428348. Note that the first 3 decimals coincide. The cubic root of 819416081 is about 935.7679378339.

The spelling of 819416081 in words is "eight hundred nineteen million, four hundred sixteen thousand, eighty-one".