1244055555 has 24 divisors (see below), whose sum is σ = 2178601152. Its totient is φ = 656653824.

The previous prime is 1244055523. The next prime is 1244055557. The reversal of 1244055555 is 5555504421.

1244055555 is a `hidden beast` number, since 12 + 4 + 40 + 55 + 555 = 666.

It is not a de Polignac number, because 1244055555 - 2⁵ = 1244055523 is a prime.

1244055555 is a modest number, since divided by 55555 gives 12440 as remainder.

It is not an unprimeable number, because it can be changed into a prime (1244055557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 138139 + ... + 146868.

It is an arithmetic number, because the mean of its divisors is an integer number (90775048).

Almost surely, 2^1244055555 is an apocalyptic number.

1244055555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1244055555 is a deficient number, since it is larger than the sum of its proper divisors (934545597).

1244055555 is a wasteful number, since it uses less digits than its factorization.

1244055555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285115 (or 285112 counting only the distinct ones).

The product of its (nonzero) digits is 100000, while the sum is 36.

The square root of 1244055555 is about 35271.1717270634. The cubic root of 1244055555 is about 1075.5070418604.

Adding to 1244055555 its reverse (5555504421), we get a palindrome (6799559976).

The spelling of 1244055555 in words is "one billion, two hundred forty-four million, fifty-five thousand, five hundred fifty-five".