1555550655 has 16 divisors (see below), whose sum is σ = 2510909280. Its totient is φ = 822284288.

The previous prime is 1555550641. The next prime is 1555550657. The reversal of 1555550655 is 5560555551.

It is a cyclic number.

It is not a de Polignac number, because 1555550655 - 2²³ = 1547162047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1555550657) 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, 457170 + ... + 460559.

It is an arithmetic number, because the mean of its divisors is an integer number (156931830).

Almost surely, 2^1555550655 is an apocalyptic number.

1555550655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1555550655 is a deficient number, since it is larger than the sum of its proper divisors (955358625).

1555550655 is a wasteful number, since it uses less digits than its factorization.

1555550655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917850.

The product of its (nonzero) digits is 468750, while the sum is 42.

The square root of 1555550655 is about 39440.4697614012. The cubic root of 1555550655 is about 1158.6743315469.

The spelling of 1555550655 in words is "one billion, five hundred fifty-five million, five hundred fifty thousand, six hundred fifty-five".