81648060876 has 72 divisors (see below), whose sum is σ = 212384412240. Its totient is φ = 26428208256.

The previous prime is 81648060863. The next prime is 81648060877. The reversal of 81648060876 is 67806084618.

81648060876 is a `hidden beast` number, since 81 + 6 + 480 + 6 + 0 + 87 + 6 = 666.

It is a super-2 number, since 2×81648060876² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (81648060877) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 617775 + ... + 738201.

Almost surely, 2^81648060876 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81648060876, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106192206120).

81648060876 is an abundant number, since it is smaller than the sum of its proper divisors (130736351364).

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

81648060876 is a wasteful number, since it uses less digits than its factorization.

81648060876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120983 (or 120978 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 54.

The spelling of 81648060876 in words is "eighty-one billion, six hundred forty-eight million, sixty thousand, eight hundred seventy-six".