81445070827 has 8 divisors (see below), whose sum is σ = 81912298832. Its totient is φ = 80978032800.

The previous prime is 81445070803. The next prime is 81445070843. The reversal of 81445070827 is 72807054418.

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 81445070827 - 2¹¹ = 81445068779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81445070227) 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, 862093 + ... + 951889.

It is an arithmetic number, because the mean of its divisors is an integer number (10239037354).

Almost surely, 2^81445070827 is an apocalyptic number.

81445070827 is a deficient number, since it is larger than the sum of its proper divisors (467228005).

81445070827 is a wasteful number, since it uses less digits than its factorization.

81445070827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94989.

The product of its (nonzero) digits is 501760, while the sum is 46.

The spelling of 81445070827 in words is "eighty-one billion, four hundred forty-five million, seventy thousand, eight hundred twenty-seven".