1123455666779 has 8 divisors (see below), whose sum is σ = 1129077411840. Its totient is φ = 1117847924776.

The previous prime is 1123455666721. The next prime is 1123455666829. The reversal of 1123455666779 is 9776665543211.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1123455666779 - 2³² = 1119160699483 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1123455666379) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3339887 + ... + 3660840.

It is an arithmetic number, because the mean of its divisors is an integer number (141134676480).

Almost surely, 2^{1123455666779} is an apocalyptic number.

1123455666779 is a deficient number, since it is larger than the sum of its proper divisors (5621745061).

1123455666779 is an equidigital number, since it uses as much as digits as its factorization.

1123455666779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7001529.

The product of its digits is 57153600, while the sum is 62.

The spelling of 1123455666779 in words is "one trillion, one hundred twenty-three billion, four hundred fifty-five million, six hundred sixty-six thousand, seven hundred seventy-nine".