18808125535855 has 4 divisors (see below), whose sum is σ = 22569750643032. Its totient is φ = 15046500428680.

The previous prime is 18808125535813. The next prime is 18808125535879. The reversal of 18808125535855 is 55853552180881.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-18808125535855 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1880812553581 + ... + 1880812553590.

It is an arithmetic number, because the mean of its divisors is an integer number (5642437660758).

Almost surely, 2^{18808125535855} is an apocalyptic number.

18808125535855 is a deficient number, since it is larger than the sum of its proper divisors (3761625107177).

18808125535855 is an equidigital number, since it uses as much as digits as its factorization.

18808125535855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3761625107176.

The product of its (nonzero) digits is 76800000, while the sum is 64.

The spelling of 18808125535855 in words is "eighteen trillion, eight hundred eight billion, one hundred twenty-five million, five hundred thirty-five thousand, eight hundred fifty-five".