81096618 has 8 divisors (see below), whose sum is σ = 162193248. Its totient is φ = 27032204.

The previous prime is 81096611. The next prime is 81096619. The reversal of 81096618 is 81669018.

It is a sphenic number, since it is the product of 3 distinct primes.

81096618 is an admirable number.

It is a super-2 number, since 2×81096618² = 13153322902075848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (81096611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6758046 + ... + 6758057.

It is an arithmetic number, because the mean of its divisors is an integer number (20274156).

Almost surely, 2^81096618 is an apocalyptic number.

81096618 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

81096618 is a wasteful number, since it uses less digits than its factorization.

81096618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13516108.

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 81096618 is about 9005.3660669625. The cubic root of 81096618 is about 432.8468364015.

The spelling of 81096618 in words is "eighty-one million, ninety-six thousand, six hundred eighteen".