81816098 has 32 divisors (see below), whose sum is σ = 152772480. Its totient is φ = 31996800.

The previous prime is 81816089. The next prime is 81816103. The reversal of 81816098 is 89061818.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

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, 13673 + ... + 18723.

It is an arithmetic number, because the mean of its divisors is an integer number (4774140).

Almost surely, 2^81816098 is an apocalyptic number.

81816098 is a deficient number, since it is larger than the sum of its proper divisors (70956382).

81816098 is a wasteful number, since it uses less digits than its factorization.

81816098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5162.

The product of its (nonzero) digits is 27648, while the sum is 41.

The square root of 81816098 is about 9045.2251492155. The cubic root of 81816098 is about 434.1231254645.

The spelling of 81816098 in words is "eighty-one million, eight hundred sixteen thousand, ninety-eight".