55555500216834 has 32 divisors (see below), whose sum is σ = 125480546945280. Its totient is φ = 18214918102800.

The previous prime is 55555500216791. The next prime is 55555500216889. The reversal of 55555500216834 is 43861200555555.

It is a happy number.

55555500216834 is a `hidden beast` number, since 5 + 5 + 5 + 5 + 550 + 0 + 2 + 1 + 6 + 83 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8432829162 + ... + 8432835749.

It is an arithmetic number, because the mean of its divisors is an integer number (3921267092040).

Almost surely, 2^{55555500216834} is an apocalyptic number.

55555500216834 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

55555500216834 is an abundant number, since it is smaller than the sum of its proper divisors (69925046728446).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55555500216834 is a wasteful number, since it uses less digits than its factorization.

55555500216834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16865664983 (or 16865664977 counting only the distinct ones).

The product of its (nonzero) digits is 18000000, while the sum is 54.

The spelling of 55555500216834 in words is "fifty-five trillion, five hundred fifty-five billion, five hundred million, two hundred sixteen thousand, eight hundred thirty-four".