81285624076 has 6 divisors (see below), whose sum is σ = 142249842140. Its totient is φ = 40642812036.

The previous prime is 81285624071. The next prime is 81285624103. The reversal of 81285624076 is 67042658218.

It is a super-3 number, since 3×81285624076³ (a number of 34 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (81285624071) 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 as a sum of consecutive naturals, namely, 10160703006 + ... + 10160703013.

Almost surely, 2^81285624076 is an apocalyptic number.

It is an amenable number.

81285624076 is a deficient number, since it is larger than the sum of its proper divisors (60964218064).

81285624076 is a wasteful number, since it uses less digits than its factorization.

81285624076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20321406023 (or 20321406021 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 49.

The spelling of 81285624076 in words is "eighty-one billion, two hundred eighty-five million, six hundred twenty-four thousand, seventy-six".