81148104 has 96 divisors (see below), whose sum is σ = 229057920. Its totient is φ = 25930368.

The previous prime is 81148099. The next prime is 81148127. The reversal of 81148104 is 40184118.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 220929 + ... + 221295.

It is an arithmetic number, because the mean of its divisors is an integer number (2386020).

Almost surely, 2^81148104 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 81148104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114528960).

81148104 is an abundant number, since it is smaller than the sum of its proper divisors (147909816).

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

81148104 is a wasteful number, since it uses less digits than its factorization.

81148104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499 (or 492 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 27.

The square root of 81148104 is about 9008.2242423243. The cubic root of 81148104 is about 432.9384178520.

The spelling of 81148104 in words is "eighty-one million, one hundred forty-eight thousand, one hundred four".