81608110 has 16 divisors (see below), whose sum is σ = 148964832. Its totient is φ = 32183200.

The previous prime is 81608083. The next prime is 81608113. The reversal of 81608110 is 1180618.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81608113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56761 + ... + 58180.

It is an arithmetic number, because the mean of its divisors is an integer number (9310302).

Almost surely, 2^81608110 is an apocalyptic number.

81608110 is a deficient number, since it is larger than the sum of its proper divisors (67356722).

81608110 is a wasteful number, since it uses less digits than its factorization.

81608110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115019.

The product of its (nonzero) digits is 384, while the sum is 25.

The square root of 81608110 is about 9033.7207174010. The cubic root of 81608110 is about 433.7549460025.

Adding to 81608110 its reverse (1180618), we get a palindrome (82788728).

It can be divided in two parts, 81608 and 110, that added together give a palindrome (81718).

The spelling of 81608110 in words is "eighty-one million, six hundred eight thousand, one hundred ten".