55555499985 has 16 divisors (see below), whose sum is σ = 88917855936. Its totient is φ = 29619914688.

The previous prime is 55555499971. The next prime is 55555500019. The reversal of 55555499985 is 58999455555.

It is not a de Polignac number, because 55555499985 - 2¹⁰ = 55555498961 is a prime.

It is a Curzon 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 15 ways as a sum of consecutive naturals, for example, 557794 + ... + 649803.

It is an arithmetic number, because the mean of its divisors is an integer number (5557365996).

Almost surely, 2^55555499985 is an apocalyptic number.

It is an amenable number.

55555499985 is a deficient number, since it is larger than the sum of its proper divisors (33362355951).

55555499985 is a wasteful number, since it uses less digits than its factorization.

55555499985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1210672.

The product of its digits is 364500000, while the sum is 69.

The spelling of 55555499985 in words is "fifty-five billion, five hundred fifty-five million, four hundred ninety-nine thousand, nine hundred eighty-five".