12636235121055 has 32 divisors (see below), whose sum is σ = 24883663010304. Its totient is φ = 5332213501056.

The previous prime is 12636235121017. The next prime is 12636235121063. The reversal of 12636235121055 is 55012153263621.

It is not a de Polignac number, because 12636235121055 - 2²⁰ = 12636234072479 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12636235120998 and 12636235121016.

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, 4628656189 + ... + 4628658918.

It is an arithmetic number, because the mean of its divisors is an integer number (777614469072).

Almost surely, 2^{12636235121055} is an apocalyptic number.

12636235121055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12636235121055 is a deficient number, since it is larger than the sum of its proper divisors (12247427889249).

12636235121055 is a wasteful number, since it uses less digits than its factorization.

12636235121055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9257315135.

The product of its (nonzero) digits is 324000, while the sum is 42.

Adding to 12636235121055 its reverse (55012153263621), we get a palindrome (67648388384676).

The spelling of 12636235121055 in words is "twelve trillion, six hundred thirty-six billion, two hundred thirty-five million, one hundred twenty-one thousand, fifty-five".