81442888824418 has 128 divisors (see below), whose sum is σ = 140652387532800. Its totient is φ = 35027287276800.

The previous prime is 81442888824383. The next prime is 81442888824439.

81442888824418 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 22258235073 + ... + 22258238731.

It is an arithmetic number, because the mean of its divisors is an integer number (1098846777600).

Almost surely, 2^{81442888824418} is an apocalyptic number.

81442888824418 is a deficient number, since it is larger than the sum of its proper divisors (59209498708382).

81442888824418 is a wasteful number, since it uses less digits than its factorization.

81442888824418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5728.

The product of its digits is 268435456, while the sum is 70.

The spelling of 81442888824418 in words is "eighty-one trillion, four hundred forty-two billion, eight hundred eighty-eight million, eight hundred twenty-four thousand, four hundred eighteen".