81495882 has 48 divisors (see below), whose sum is σ = 197215200. Its totient is φ = 25073712.

The previous prime is 81495863. The next prime is 81495937. The reversal of 81495882 is 28859418.

It is a happy number.

81495882 is a `hidden beast` number, since 81 + 495 + 8 + 82 = 666.

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, 132 + ... + 12767.

It is an arithmetic number, because the mean of its divisors is an integer number (4108650).

Almost surely, 2^81495882 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81495882, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98607600).

81495882 is an abundant number, since it is smaller than the sum of its proper divisors (115719318).

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

81495882 is a wasteful number, since it uses less digits than its factorization.

81495882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12929 (or 12917 counting only the distinct ones).

The product of its digits is 184320, while the sum is 45.

The square root of 81495882 is about 9027.5069648270. The cubic root of 81495882 is about 433.5560205856.

The spelling of 81495882 in words is "eighty-one million, four hundred ninety-five thousand, eight hundred eighty-two".