1123355567689 has 4 divisors (see below), whose sum is σ = 1124119237120. Its totient is φ = 1122591898260.

The previous prime is 1123355567651. The next prime is 1123355567713. The reversal of 1123355567689 is 9867655533211.

It is a happy number.

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 not a de Polignac number, because 1123355567689 - 2¹⁹ = 1123355043401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1123355567639) 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, 381832509 + ... + 381835450.

It is an arithmetic number, because the mean of its divisors is an integer number (281029809280).

Almost surely, 2^{1123355567689} is an apocalyptic number.

It is an amenable number.

1123355567689 is a deficient number, since it is larger than the sum of its proper divisors (763669431).

1123355567689 is an equidigital number, since it uses as much as digits as its factorization.

1123355567689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763669430.

The product of its digits is 40824000, while the sum is 61.

The spelling of 1123355567689 in words is "one trillion, one hundred twenty-three billion, three hundred fifty-five million, five hundred sixty-seven thousand, six hundred eighty-nine".