81552944 has 80 divisors (see below), whose sum is σ = 185050656. Its totient is φ = 34406400.

The previous prime is 81552929. The next prime is 81553007. The reversal of 81552944 is 44925518.

It is a junction number, because it is equal to n+sod(n) for n = 81552898 and 81552907.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 290084 + ... + 290364.

Almost surely, 2^81552944 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 81552944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92525328).

81552944 is an abundant number, since it is smaller than the sum of its proper divisors (103497712).

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

81552944 is a wasteful number, since it uses less digits than its factorization.

81552944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414 (or 408 counting only the distinct ones).

The product of its digits is 57600, while the sum is 38.

The square root of 81552944 is about 9030.6668635267. Note that the first 3 decimals coincide. The cubic root of 81552944 is about 433.6571864409.

The spelling of 81552944 in words is "eighty-one million, five hundred fifty-two thousand, nine hundred forty-four".