11123455556779 has 32 divisors (see below), whose sum is σ = 11650220588160. Its totient is φ = 10609835673600.

The previous prime is 11123455556723. The next prime is 11123455556821. The reversal of 11123455556779 is 97765555432111.

It is a cyclic number.

It is not a de Polignac number, because 11123455556779 - 2⁷ = 11123455556651 is a prime.

It is a super-2 number, since 2×11123455556779² (a number of 27 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (61) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (61).

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 (11123455557779) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 956192547 + ... + 956204179.

It is an arithmetic number, because the mean of its divisors is an integer number (364069393380).

Almost surely, 2^{11123455556779} is an apocalyptic number.

11123455556779 is a deficient number, since it is larger than the sum of its proper divisors (526765031381).

11123455556779 is a wasteful number, since it uses less digits than its factorization.

11123455556779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13111.

The product of its digits is 39690000, while the sum is 61.

The spelling of 11123455556779 in words is "eleven trillion, one hundred twenty-three billion, four hundred fifty-five million, five hundred fifty-six thousand, seven hundred seventy-nine".