1255505555 has 8 divisors (see below), whose sum is σ = 1558558800. Its totient is φ = 969769696.

The previous prime is 1255505551. The next prime is 1255505561. The reversal of 1255505555 is 5555055521.

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 1255505555 - 2² = 1255505551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1255505551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4329185 + ... + 4329474.

It is an arithmetic number, because the mean of its divisors is an integer number (194819850).

Almost surely, 2^1255505555 is an apocalyptic number.

1255505555 is a deficient number, since it is larger than the sum of its proper divisors (303053245).

1255505555 is an equidigital number, since it uses as much as digits as its factorization.

1255505555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8658693.

The product of its (nonzero) digits is 156250, while the sum is 38.

The square root of 1255505555 is about 35433.1138202671. The cubic root of 1255505555 is about 1078.7965432741.

The spelling of 1255505555 in words is "one billion, two hundred fifty-five million, five hundred five thousand, five hundred fifty-five".