1855709055 has 16 divisors (see below), whose sum is σ = 3299038560. Its totient is φ = 989711424.

The previous prime is 1855709041. The next prime is 1855709059. The reversal of 1855709055 is 5509075581.

1855709055 is a `hidden beast` number, since 1 + 8 + 557 + 0 + 90 + 5 + 5 = 666.

It is not a de Polignac number, because 1855709055 - 2⁶ = 1855708991 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1855709055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1855709059) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6872862 + ... + 6873131.

It is an arithmetic number, because the mean of its divisors is an integer number (206189910).

Almost surely, 2^1855709055 is an apocalyptic number.

1855709055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1855709055 is a deficient number, since it is larger than the sum of its proper divisors (1443329505).

1855709055 is a wasteful number, since it uses less digits than its factorization.

1855709055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13746007 (or 13746001 counting only the distinct ones).

The product of its (nonzero) digits is 315000, while the sum is 45.

The square root of 1855709055 is about 43077.9416290983. The cubic root of 1855709055 is about 1228.8625117448.

The spelling of 1855709055 in words is "one billion, eight hundred fifty-five million, seven hundred nine thousand, fifty-five".