1855385355 has 16 divisors (see below), whose sum is σ = 3143241504. Its totient is φ = 931330560.

The previous prime is 1855385353. The next prime is 1855385377. The reversal of 1855385355 is 5535835581.

It is not a de Polignac number, because 1855385355 - 2¹ = 1855385353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1855385353) 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 15 ways as a sum of consecutive naturals, for example, 3637756 + ... + 3638265.

It is an arithmetic number, because the mean of its divisors is an integer number (196452594).

Almost surely, 2^1855385355 is an apocalyptic number.

1855385355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1855385355 is a deficient number, since it is larger than the sum of its proper divisors (1287856149).

1855385355 is a wasteful number, since it uses less digits than its factorization.

1855385355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7276046.

The product of its digits is 1800000, while the sum is 48.

The square root of 1855385355 is about 43074.1843219346. The cubic root of 1855385355 is about 1228.7910555135.

The spelling of 1855385355 in words is "one billion, eight hundred fifty-five million, three hundred eighty-five thousand, three hundred fifty-five".