1855055550 has 24 divisors (see below), whose sum is σ = 4600538136. Its totient is φ = 494681440.

The previous prime is 1855055483. The next prime is 1855055551. The reversal of 1855055550 is 555505581.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1855055499 and 1855055508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1855055551) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 6183369 + ... + 6183668.

It is an arithmetic number, because the mean of its divisors is an integer number (191689089).

Almost surely, 2^1855055550 is an apocalyptic number.

1855055550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1855055550 is an abundant number, since it is smaller than the sum of its proper divisors (2745482586).

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

1855055550 is a wasteful number, since it uses less digits than its factorization.

1855055550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12367052 (or 12367047 counting only the distinct ones).

The product of its (nonzero) digits is 125000, while the sum is 39.

The square root of 1855055550 is about 43070.3558146436. The cubic root of 1855055550 is about 1228.7182430656.

The spelling of 1855055550 in words is "one billion, eight hundred fifty-five million, fifty-five thousand, five hundred fifty".