11447556663 has 4 divisors (see below), whose sum is σ = 15263408888. Its totient is φ = 7631704440.

The previous prime is 11447556661. The next prime is 11447556671. The reversal of 11447556663 is 36665574411.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 11447556663 - 2¹ = 11447556661 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 (11447556661) 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 3 ways as a sum of consecutive naturals, for example, 1907926108 + ... + 1907926113.

It is an arithmetic number, because the mean of its divisors is an integer number (3815852222).

Almost surely, 2^11447556663 is an apocalyptic number.

11447556663 is a deficient number, since it is larger than the sum of its proper divisors (3815852225).

11447556663 is an equidigital number, since it uses as much as digits as its factorization.

11447556663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3815852224.

The product of its digits is 1814400, while the sum is 48.

The spelling of 11447556663 in words is "eleven billion, four hundred forty-seven million, five hundred fifty-six thousand, six hundred sixty-three".