1123345555556 has 12 divisors (see below), whose sum is σ = 2246691111168. Its totient is φ = 481433809512.

The previous prime is 1123345555547. The next prime is 1123345555601. The reversal of 1123345555556 is 6555555433211.

It is a happy number.

1123345555556 is an admirable number.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a plaindrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20059742036 + ... + 20059742091.

It is an arithmetic number, because the mean of its divisors is an integer number (187224259264).

Almost surely, 2^{1123345555556} is an apocalyptic number.

It is an amenable number.

1123345555556 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1123345555556 is a wasteful number, since it uses less digits than its factorization.

1123345555556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40119484138 (or 40119484136 counting only the distinct ones).

The product of its digits is 6750000, while the sum is 50.

The spelling of 1123345555556 in words is "one trillion, one hundred twenty-three billion, three hundred forty-five million, five hundred fifty-five thousand, five hundred fifty-six".