1806555500 has 48 divisors (see below), whose sum is σ = 3975779808. Its totient is φ = 717080000.

The previous prime is 1806555469. The next prime is 1806555529. The reversal of 1806555500 is 55556081.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

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, 51710 + ... + 79290.

It is an arithmetic number, because the mean of its divisors is an integer number (82828746).

Almost surely, 2^1806555500 is an apocalyptic number.

1806555500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1806555500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1987889904).

1806555500 is an abundant number, since it is smaller than the sum of its proper divisors (2169224308).

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

1806555500 is a wasteful number, since it uses less digits than its factorization.

1806555500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27731 (or 27719 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 35.

The square root of 1806555500 is about 42503.5939656872. The cubic root of 1806555500 is about 1217.9153461207.

The spelling of 1806555500 in words is "one billion, eight hundred six million, five hundred fifty-five thousand, five hundred".