81134608 has 40 divisors (see below), whose sum is σ = 167152248. Its totient is φ = 38019072.

The previous prime is 81134539. The next prime is 81134621. The reversal of 81134608 is 80643118.

It can be written as a sum of positive squares in 4 ways, for example, as 1710864 + 79423744 = 1308^2 + 8912^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 81134608.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84660 + ... + 85612.

Almost surely, 2^81134608 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 81134608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83576124).

81134608 is an abundant number, since it is smaller than the sum of its proper divisors (86017640).

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

81134608 is a wasteful number, since it uses less digits than its factorization.

81134608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1291 (or 1285 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 81134608 is about 9007.4751179229. The cubic root of 81134608 is about 432.9144153983.

It can be divided in two parts, 8113 and 4608, that added together give a palindrome (12721).

The spelling of 81134608 in words is "eighty-one million, one hundred thirty-four thousand, six hundred eight".