81411050345 has 8 divisors (see below), whose sum is σ = 97735879176. Its totient is φ = 65100427776.

The previous prime is 81411050333. The next prime is 81411050351. The reversal of 81411050345 is 54305011418.

It can be written as a sum of positive squares in 4 ways, for example, as 60031504 + 81351018841 = 7748^2 + 285221^2 .

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 81411050345 - 2³² = 77116083049 is a prime.

It is a super-2 number, since 2×81411050345² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3538952 + ... + 3561881.

It is an arithmetic number, because the mean of its divisors is an integer number (12216984897).

Almost surely, 2^81411050345 is an apocalyptic number.

It is an amenable number.

81411050345 is a deficient number, since it is larger than the sum of its proper divisors (16324828831).

81411050345 is a wasteful number, since it uses less digits than its factorization.

81411050345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7103131.

The product of its (nonzero) digits is 9600, while the sum is 32.

The spelling of 81411050345 in words is "eighty-one billion, four hundred eleven million, fifty thousand, three hundred forty-five".