1855889655 has 32 divisors (see below), whose sum is σ = 3075192000. Its totient is φ = 954627072.

The previous prime is 1855889647. The next prime is 1855889683. The reversal of 1855889655 is 5569885581.

It is not a de Polignac number, because 1855889655 - 2³ = 1855889647 is a prime.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 536371 + ... + 539819.

It is an arithmetic number, because the mean of its divisors is an integer number (96099750).

Almost surely, 2^1855889655 is an apocalyptic number.

1855889655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1855889655 is a deficient number, since it is larger than the sum of its proper divisors (1219302345).

1855889655 is a wasteful number, since it uses less digits than its factorization.

1855889655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4723.

The product of its digits is 17280000, while the sum is 60.

The square root of 1855889655 is about 43080.0377785350. The cubic root of 1855889655 is about 1228.9023752802.

The spelling of 1855889655 in words is "one billion, eight hundred fifty-five million, eight hundred eighty-nine thousand, six hundred fifty-five".