104044040009981 has 2 divisors, whose sum is σ = 104044040009982. Its totient is φ = 104044040009980.

The previous prime is 104044040009977. The next prime is 104044040010011. The reversal of 104044040009981 is 189900040440401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90335045025625 + 13708994984356 = 9504475^2 + 3702566^2 .

It is a cyclic number.

It is not a de Polignac number, because 104044040009981 - 2² = 104044040009977 is a prime.

It is a super-2 number, since 2×104044040009981² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (104044040009881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52022020004990 + 52022020004991.

It is an arithmetic number, because the mean of its divisors is an integer number (52022020004991).

Almost surely, 2^{104044040009981} is an apocalyptic number.

It is an amenable number.

104044040009981 is a deficient number, since it is larger than the sum of its proper divisors (1).

104044040009981 is an equidigital number, since it uses as much as digits as its factorization.

104044040009981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 44.

The spelling of 104044040009981 in words is "one hundred four trillion, forty-four billion, forty million, nine thousand, nine hundred eighty-one".