81110803941 has 12 divisors (see below), whose sum is σ = 117162858540. Its totient is φ = 54072573120.

The previous prime is 81110803927. The next prime is 81110803973. The reversal of 81110803941 is 14930801118.

81110803941 is a `hidden beast` number, since 81 + 110 + 80 + 394 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 24671299041 + 56439504900 = 157071^2 + 237570^2 .

It is not a de Polignac number, because 81110803941 - 2²⁹ = 80573933029 is a prime.

It is a super-2 number, since 2×81110803941² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 81110803896 and 81110803905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81110803841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 428631 + ... + 588171.

It is an arithmetic number, because the mean of its divisors is an integer number (9763571545).

Almost surely, 2^81110803941 is an apocalyptic number.

It is an amenable number.

81110803941 is a deficient number, since it is larger than the sum of its proper divisors (36052054599).

81110803941 is a wasteful number, since it uses less digits than its factorization.

81110803941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216036 (or 216033 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 36.

The spelling of 81110803941 in words is "eighty-one billion, one hundred ten million, eight hundred three thousand, nine hundred forty-one".