1255555554 has 16 divisors (see below), whose sum is σ = 2739394080. Its totient is φ = 380471360.

The previous prime is 1255555541. The next prime is 1255555571. The reversal of 1255555554 is 4555555521.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9511719 + ... + 9511850.

It is an arithmetic number, because the mean of its divisors is an integer number (171212130).

Almost surely, 2^1255555554 is an apocalyptic number.

1255555554 is an abundant number, since it is smaller than the sum of its proper divisors (1483838526).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1255555554 is a wasteful number, since it uses less digits than its factorization.

1255555554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19023585.

The product of its digits is 625000, while the sum is 42.

The square root of 1255555554 is about 35433.8193538320. The cubic root of 1255555554 is about 1078.8108636760.

The spelling of 1255555554 in words is "one billion, two hundred fifty-five million, five hundred fifty-five thousand, five hundred fifty-four".