55111263123613 has 4 divisors (see below), whose sum is σ = 55111669256448. Its totient is φ = 55110856990780.

The previous prime is 55111263123523. The next prime is 55111263123619. The reversal of 55111263123613 is 31632136211155.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55111263123613 is a prime.

It is a super-3 number, since 3×55111263123613³ (a number of 42 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55111263123619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202862803 + ... + 203134288.

It is an arithmetic number, because the mean of its divisors is an integer number (13777917314112).

Almost surely, 2^{55111263123613} is an apocalyptic number.

It is an amenable number.

55111263123613 is a deficient number, since it is larger than the sum of its proper divisors (406132835).

55111263123613 is a wasteful number, since it uses less digits than its factorization.

55111263123613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406132834.

The product of its digits is 97200, while the sum is 40.

Adding to 55111263123613 its reverse (31632136211155), we get a palindrome (86743399334768).

The spelling of 55111263123613 in words is "fifty-five trillion, one hundred eleven billion, two hundred sixty-three million, one hundred twenty-three thousand, six hundred thirteen".