81695006088 has 32 divisors (see below), whose sum is σ = 204822744000. Its totient is φ = 27153638208.

The previous prime is 81695006011. The next prime is 81695006111. The reversal of 81695006088 is 88060059618.

It is a self number, because there is not a number n which added to its sum of digits gives 81695006088.

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 7 ways as a sum of consecutive naturals, for example, 4868356 + ... + 4885107.

It is an arithmetic number, because the mean of its divisors is an integer number (6400710750).

Almost surely, 2^81695006088 is an apocalyptic number.

It is an amenable number.

81695006088 is an abundant number, since it is smaller than the sum of its proper divisors (123127737912).

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

81695006088 is a wasteful number, since it uses less digits than its factorization.

81695006088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9753821 (or 9753817 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 51.

The spelling of 81695006088 in words is "eighty-one billion, six hundred ninety-five million, six thousand, eighty-eight".