81244310110 has 32 divisors (see below), whose sum is σ = 147775145472. Its totient is φ = 32156908800.

The previous prime is 81244310101. The next prime is 81244310149. The reversal of 81244310110 is 1101344218.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1747587 + ... + 1793473.

It is an arithmetic number, because the mean of its divisors is an integer number (4617973296).

Almost surely, 2^81244310110 is an apocalyptic number.

81244310110 is a deficient number, since it is larger than the sum of its proper divisors (66530835362).

81244310110 is a wasteful number, since it uses less digits than its factorization.

81244310110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47748.

The product of its (nonzero) digits is 768, while the sum is 25.

Adding to 81244310110 its reverse (1101344218), we get a palindrome (82345654328).

The spelling of 81244310110 in words is "eighty-one billion, two hundred forty-four million, three hundred ten thousand, one hundred ten".