1123455666788 has 96 divisors (see below), whose sum is σ = 2530443041280. Its totient is φ = 424196720640.

The previous prime is 1123455666721. The next prime is 1123455666829. The reversal of 1123455666788 is 8876665543211.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 1123455666788.

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, 3713948 + ... + 4005036.

It is an arithmetic number, because the mean of its divisors is an integer number (26358781680).

Almost surely, 2^{1123455666788} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1123455666788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1265221520640).

1123455666788 is an abundant number, since it is smaller than the sum of its proper divisors (1406987374492).

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

1123455666788 is a wasteful number, since it uses less digits than its factorization.

1123455666788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291597 (or 291595 counting only the distinct ones).

The product of its digits is 58060800, while the sum is 62.

The spelling of 1123455666788 in words is "one trillion, one hundred twenty-three billion, four hundred fifty-five million, six hundred sixty-six thousand, seven hundred eighty-eight".