11556386536423 has 12 divisors (see below), whose sum is σ = 12245602541328. Its totient is φ = 10868224597440.

The previous prime is 11556386536421. The next prime is 11556386536469. The reversal of 11556386536423 is 32463568365511.

It is not a de Polignac number, because 11556386536423 - 2¹ = 11556386536421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11556386536421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28662558 + ... + 29062948.

It is an arithmetic number, because the mean of its divisors is an integer number (1020466878444).

Almost surely, 2^{11556386536423} is an apocalyptic number.

11556386536423 is a deficient number, since it is larger than the sum of its proper divisors (689216004905).

11556386536423 is an frugal number, since it uses more digits than its factorization.

11556386536423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403014 (or 401711 counting only the distinct ones).

The product of its digits is 46656000, while the sum is 58.

The spelling of 11556386536423 in words is "eleven trillion, five hundred fifty-six billion, three hundred eighty-six million, five hundred thirty-six thousand, four hundred twenty-three".