18786858405055 has 16 divisors (see below), whose sum is σ = 24286747836960. Its totient is φ = 13868603100288.

The previous prime is 18786858405043. The next prime is 18786858405109. The reversal of 18786858405055 is 55050485868781.

It is a cyclic number.

It is not a de Polignac number, because 18786858405055 - 2²⁵ = 18786824850623 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49489257 + ... + 49867426.

It is an arithmetic number, because the mean of its divisors is an integer number (1517921739810).

Almost surely, 2^{18786858405055} is an apocalyptic number.

18786858405055 is a deficient number, since it is larger than the sum of its proper divisors (5499889431905).

18786858405055 is a wasteful number, since it uses less digits than its factorization.

18786858405055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99359610.

The product of its (nonzero) digits is 430080000, while the sum is 70.

The spelling of 18786858405055 in words is "eighteen trillion, seven hundred eighty-six billion, eight hundred fifty-eight million, four hundred five thousand, fifty-five".