1123445666779 has 16 divisors (see below), whose sum is σ = 1216313766720. Its totient is φ = 1034466048000.

The previous prime is 1123445666773. The next prime is 1123445666857. The reversal of 1123445666779 is 9776665443211.

It is a cyclic number.

It is not a de Polignac number, because 1123445666779 - 2²⁹ = 1122908795867 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 (1123445666773) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2274222 + ... + 2723779.

It is an arithmetic number, because the mean of its divisors is an integer number (76019610420).

Almost surely, 2^{1123445666779} is an apocalyptic number.

1123445666779 is a deficient number, since it is larger than the sum of its proper divisors (92868099941).

1123445666779 is a wasteful number, since it uses less digits than its factorization.

1123445666779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4998390.

The product of its digits is 45722880, while the sum is 61.

The spelling of 1123445666779 in words is "one trillion, one hundred twenty-three billion, four hundred forty-five million, six hundred sixty-six thousand, seven hundred seventy-nine".