81411104047 has 24 divisors (see below), whose sum is σ = 102598374816. Its totient is φ = 64027389888.

The previous prime is 81411104017. The next prime is 81411104063. The reversal of 81411104047 is 74040111418.

It is not a de Polignac number, because 81411104047 - 2⁷ = 81411103919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81411104017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 276268 + ... + 489025.

It is an arithmetic number, because the mean of its divisors is an integer number (4274932284).

Almost surely, 2^81411104047 is an apocalyptic number.

81411104047 is a deficient number, since it is larger than the sum of its proper divisors (21187270769).

81411104047 is a wasteful number, since it uses less digits than its factorization.

81411104047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765487 (or 765480 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 31.

The spelling of 81411104047 in words is "eighty-one billion, four hundred eleven million, one hundred four thousand, forty-seven".