1356123555 has 48 divisors (see below), whose sum is σ = 2423547360. Its totient is φ = 701167104.

The previous prime is 1356123553. The next prime is 1356123557. The reversal of 1356123555 is 5553216531.

1356123555 is a `hidden beast` number, since 1 + 3 + 5 + 612 + 35 + 5 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (1356123553) and next prime (1356123557).

It is not a de Polignac number, because 1356123555 - 2¹ = 1356123553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1356123553) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 190317 + ... + 197313.

It is an arithmetic number, because the mean of its divisors is an integer number (50490570).

Almost surely, 2^1356123555 is an apocalyptic number.

1356123555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1356123555 is a deficient number, since it is larger than the sum of its proper divisors (1067423805).

1356123555 is a wasteful number, since it uses less digits than its factorization.

1356123555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7140 (or 7137 counting only the distinct ones).

The product of its digits is 67500, while the sum is 36.

The square root of 1356123555 is about 36825.5828874439. The cubic root of 1356123555 is about 1106.8779937169.

The spelling of 1356123555 in words is "one billion, three hundred fifty-six million, one hundred twenty-three thousand, five hundred fifty-five".