81152448 has 168 divisors, whose sum is σ = 242078256. Its totient is φ = 23961600.

The previous prime is 81152437. The next prime is 81152453. The reversal of 81152448 is 84425118.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1330338 + ... + 1330398.

It is an arithmetic number, because the mean of its divisors is an integer number (1440942).

Almost surely, 2^81152448 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 81152448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121039128).

81152448 is an abundant number, since it is smaller than the sum of its proper divisors (160925808).

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

81152448 is a wasteful number, since it uses less digits than its factorization.

81152448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143 (or 120 counting only the distinct ones).

The product of its digits is 10240, while the sum is 33.

The square root of 81152448 is about 9008.4653521008. The cubic root of 81152448 is about 432.9461430312.

The spelling of 81152448 in words is "eighty-one million, one hundred fifty-two thousand, four hundred forty-eight".