11556347123 has 2 divisors, whose sum is σ = 11556347124. Its totient is φ = 11556347122.

The previous prime is 11556347111. The next prime is 11556347147. The reversal of 11556347123 is 32174365511.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11556347123 - 2⁴ = 11556347107 is a prime.

It is not a weakly prime, because it can be changed into another prime (11556347623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5778173561 + 5778173562.

It is an arithmetic number, because the mean of its divisors is an integer number (5778173562).

Almost surely, 2^11556347123 is an apocalyptic number.

11556347123 is a deficient number, since it is larger than the sum of its proper divisors (1).

11556347123 is an equidigital number, since it uses as much as digits as its factorization.

11556347123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75600, while the sum is 38.

The spelling of 11556347123 in words is "eleven billion, five hundred fifty-six million, three hundred forty-seven thousand, one hundred twenty-three".