81103494241 has 32 divisors (see below), whose sum is σ = 101857029120. Its totient is φ = 62736120000.

The previous prime is 81103494169. The next prime is 81103494289. The reversal of 81103494241 is 14249430118.

It is a cyclic number.

It is not a de Polignac number, because 81103494241 - 2¹⁹ = 81102969953 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 81103494241.

It is not an unprimeable number, because it can be changed into a prime (81103494541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5926555 + ... + 5940223.

It is an arithmetic number, because the mean of its divisors is an integer number (3183032160).

Almost surely, 2^81103494241 is an apocalyptic number.

It is an amenable number.

81103494241 is a deficient number, since it is larger than the sum of its proper divisors (20753534879).

81103494241 is a wasteful number, since it uses less digits than its factorization.

81103494241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14245.

The product of its (nonzero) digits is 27648, while the sum is 37.

The spelling of 81103494241 in words is "eighty-one billion, one hundred three million, four hundred ninety-four thousand, two hundred forty-one".