13123116555 has 32 divisors (see below), whose sum is σ = 23063063040. Its totient is φ = 6342336000.

The previous prime is 13123116553. The next prime is 13123116563. The reversal of 13123116555 is 55561132131.

13123116555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13123116555 - 2¹ = 13123116553 is a prime.

It is a super-2 number, since 2×13123116555² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13123116553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 994446 + ... + 1007555.

It is an arithmetic number, because the mean of its divisors is an integer number (720720720).

Almost surely, 2^13123116555 is an apocalyptic number.

13123116555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13123116555 is a deficient number, since it is larger than the sum of its proper divisors (9939946485).

13123116555 is a wasteful number, since it uses less digits than its factorization.

13123116555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2002051.

The product of its digits is 13500, while the sum is 33.

Adding to 13123116555 its reverse (55561132131), we get a palindrome (68684248686).

The spelling of 13123116555 in words is "thirteen billion, one hundred twenty-three million, one hundred sixteen thousand, five hundred fifty-five".