11111234556 has 48 divisors (see below), whose sum is σ = 26127108000. Its totient is φ = 3675098112.

The previous prime is 11111234549. The next prime is 11111234587. The reversal of 11111234556 is 65543211111.

It is a plaindrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2130480 + ... + 2135688.

It is an arithmetic number, because the mean of its divisors is an integer number (544314750).

Almost surely, 2^11111234556 is an apocalyptic number.

It is an amenable number.

11111234556 is an abundant number, since it is smaller than the sum of its proper divisors (15015873444).

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

11111234556 is a wasteful number, since it uses less digits than its factorization.

11111234556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6558 (or 6556 counting only the distinct ones).

The product of its digits is 3600, while the sum is 30.

Adding to 11111234556 its reverse (65543211111), we get a palindrome (76654445667).

The spelling of 11111234556 in words is "eleven billion, one hundred eleven million, two hundred thirty-four thousand, five hundred fifty-six".