12555555555 has 16 divisors (see below), whose sum is σ = 20127459744. Its totient is φ = 6683439360.

The previous prime is 12555555553. The next prime is 12555555589. The reversal of 12555555555 is 55555555521.

It is a happy number.

It is not a de Polignac number, because 12555555555 - 2¹ = 12555555553 is a prime.

12555555555 is a modest number, since divided by 555555 gives 12555 as remainder.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (12555555553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 795484 + ... + 811113.

It is an arithmetic number, because the mean of its divisors is an integer number (1257966234).

Almost surely, 2^12555555555 is an apocalyptic number.

12555555555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12555555555 is a deficient number, since it is larger than the sum of its proper divisors (7571904189).

12555555555 is a wasteful number, since it uses less digits than its factorization.

12555555555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1607126.

The product of its digits is 3906250, while the sum is 48.

The spelling of 12555555555 in words is "twelve billion, five hundred fifty-five million, five hundred fifty-five thousand, five hundred fifty-five".