81232023194880 has 576 divisors, whose sum is σ = 269342531555328. Its totient is φ = 20850902138880.

The previous prime is 81232023194779. The next prime is 81232023194897. The reversal of 81232023194880 is 8849132023218.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7992912679 + ... + 7992922841.

It is an arithmetic number, because the mean of its divisors is an integer number (467608561728).

Almost surely, 2^{81232023194880} is an apocalyptic number.

81232023194880 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81232023194880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134671265777664).

81232023194880 is an abundant number, since it is smaller than the sum of its proper divisors (188110508360448).

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

81232023194880 is a wasteful number, since it uses less digits than its factorization.

81232023194880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10962 (or 10948 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 51.

The spelling of 81232023194880 in words is "eighty-one trillion, two hundred thirty-two billion, twenty-three million, one hundred ninety-four thousand, eight hundred eighty".