18555409348101 has 8 divisors (see below), whose sum is σ = 27489495330560. Its totient is φ = 12370272898716.

The previous prime is 18555409348081. The next prime is 18555409348123. The reversal of 18555409348101 is 10184390455581.

18555409348101 is a `hidden beast` number, since 1 + 8 + 5 + 5 + 540 + 93 + 4 + 8 + 1 + 0 + 1 = 666.

It is not a de Polignac number, because 18555409348101 - 2⁷ = 18555409347973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18555409348141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 343618691605 + ... + 343618691658.

It is an arithmetic number, because the mean of its divisors is an integer number (3436186916320).

Almost surely, 2^{18555409348101} is an apocalyptic number.

It is an amenable number.

18555409348101 is a deficient number, since it is larger than the sum of its proper divisors (8934085982459).

18555409348101 is an equidigital number, since it uses as much as digits as its factorization.

18555409348101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687237383272 (or 687237383266 counting only the distinct ones).

The product of its (nonzero) digits is 3456000, while the sum is 54.

The spelling of 18555409348101 in words is "eighteen trillion, five hundred fifty-five billion, four hundred nine million, three hundred forty-eight thousand, one hundred one".