12606400055 has 32 divisors (see below), whose sum is σ = 15671928384. Its totient is φ = 9727451136.

The previous prime is 12606400049. The next prime is 12606400063. The reversal of 12606400055 is 55000460621.

It is a cyclic number.

It is not a de Polignac number, because 12606400055 - 2¹⁰ = 12606399031 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15816917 + ... + 15817713.

It is an arithmetic number, because the mean of its divisors is an integer number (489747762).

Almost surely, 2^12606400055 is an apocalyptic number.

12606400055 is a deficient number, since it is larger than the sum of its proper divisors (3065528329).

12606400055 is a wasteful number, since it uses less digits than its factorization.

12606400055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1475.

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 12606400055 its reverse (55000460621), we get a palindrome (67606860676).

The spelling of 12606400055 in words is "twelve billion, six hundred six million, four hundred thousand, fifty-five".