1855489855 has 8 divisors (see below), whose sum is σ = 2226820752. Its totient is φ = 1484236608.

The previous prime is 1855489819. The next prime is 1855489913. The reversal of 1855489855 is 5589845581.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1855489855 - 2¹⁷ = 1855358783 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1855489855.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74272 + ... + 96058.

It is an arithmetic number, because the mean of its divisors is an integer number (278352594).

Almost surely, 2^1855489855 is an apocalyptic number.

1855489855 is a deficient number, since it is larger than the sum of its proper divisors (371330897).

1855489855 is a wasteful number, since it uses less digits than its factorization.

1855489855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38825.

The product of its digits is 11520000, while the sum is 58.

The square root of 1855489855 is about 43075.3973284055. The cubic root of 1855489855 is about 1228.8141246214.

The spelling of 1855489855 in words is "one billion, eight hundred fifty-five million, four hundred eighty-nine thousand, eight hundred fifty-five".