18400500055055 has 32 divisors (see below), whose sum is σ = 22871663221248. Its totient is φ = 14196391372800.

The previous prime is 18400500055039. The next prime is 18400500055057. The reversal of 18400500055055 is 55055000500481.

It is not a de Polignac number, because 18400500055055 - 2⁴ = 18400500055039 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 (18400500055057) 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, 52558547 + ... + 52907483.

It is an arithmetic number, because the mean of its divisors is an integer number (714739475664).

Almost surely, 2^{18400500055055} is an apocalyptic number.

18400500055055 is a deficient number, since it is larger than the sum of its proper divisors (4471163166193).

18400500055055 is a wasteful number, since it uses less digits than its factorization.

18400500055055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350147.

The product of its (nonzero) digits is 100000, while the sum is 38.

The spelling of 18400500055055 in words is "eighteen trillion, four hundred billion, five hundred million, fifty-five thousand, fifty-five".