12555031278 has 16 divisors (see below), whose sum is σ = 25307781120. Its totient is φ = 4152057336.

The previous prime is 12555031249. The next prime is 12555031331. The reversal of 12555031278 is 87213055521.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 8237448 + ... + 8238971.

It is an arithmetic number, because the mean of its divisors is an integer number (1581736320).

Almost surely, 2^12555031278 is an apocalyptic number.

12555031278 is an abundant number, since it is smaller than the sum of its proper divisors (12752749842).

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

12555031278 is a wasteful number, since it uses less digits than its factorization.

12555031278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16476551.

The product of its (nonzero) digits is 84000, while the sum is 39.

Adding to 12555031278 its reverse (87213055521), we get a palindrome (99768086799).

The spelling of 12555031278 in words is "twelve billion, five hundred fifty-five million, thirty-one thousand, two hundred seventy-eight".