81696800808 has 48 divisors (see below), whose sum is σ = 252871051680. Its totient is φ = 23341942944.

The previous prime is 81696800753. The next prime is 81696800833. The reversal of 81696800808 is 80800869618.

It is a super-3 number, since 3×81696800808³ (a number of 34 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 81047910 + ... + 81048917.

It is an arithmetic number, because the mean of its divisors is an integer number (5268146910).

Almost surely, 2^81696800808 is an apocalyptic number.

It is an amenable number.

81696800808 is an abundant number, since it is smaller than the sum of its proper divisors (171174250872).

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

81696800808 is a wasteful number, since it uses less digits than its factorization.

81696800808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162096846 (or 162096839 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 54.

The spelling of 81696800808 in words is "eighty-one billion, six hundred ninety-six million, eight hundred thousand, eight hundred eight".