11556255563 has 8 divisors (see below), whose sum is σ = 12880037520. Its totient is φ = 10304029440.

The previous prime is 11556255541. The next prime is 11556255611. The reversal of 11556255563 is 36555265511.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11556255563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11556255533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17888618 + ... + 17889263.

It is an arithmetic number, because the mean of its divisors is an integer number (1610004690).

Almost surely, 2^11556255563 is an apocalyptic number.

11556255563 is a deficient number, since it is larger than the sum of its proper divisors (1323781957).

11556255563 is a wasteful number, since it uses less digits than its factorization.

11556255563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35777917.

The product of its digits is 675000, while the sum is 44.

The spelling of 11556255563 in words is "eleven billion, five hundred fifty-six million, two hundred fifty-five thousand, five hundred sixty-three".