1555811055 has 12 divisors (see below), whose sum is σ = 2696739240. Its totient is φ = 829765872.

The previous prime is 1555811041. The next prime is 1555811063. The reversal of 1555811055 is 5501185551.

It is a happy number.

1555811055 is a `hidden beast` number, since 15 + 5 + 581 + 10 + 55 = 666.

It is not a de Polignac number, because 1555811055 - 2¹⁶ = 1555745519 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17286745 + ... + 17286834.

It is an arithmetic number, because the mean of its divisors is an integer number (224728270).

Almost surely, 2^1555811055 is an apocalyptic number.

1555811055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1555811055 is a deficient number, since it is larger than the sum of its proper divisors (1140928185).

1555811055 is a wasteful number, since it uses less digits than its factorization.

1555811055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34573590 (or 34573587 counting only the distinct ones).

The product of its (nonzero) digits is 25000, while the sum is 36.

The square root of 1555811055 is about 39443.7708009769. The cubic root of 1555811055 is about 1158.7389821709.

The spelling of 1555811055 in words is "one billion, five hundred fifty-five million, eight hundred eleven thousand, fifty-five".