55321663603 has 4 divisors (see below), whose sum is σ = 55322916768. Its totient is φ = 55320410440.

The previous prime is 55321663601. The next prime is 55321663609. The reversal of 55321663603 is 30636612355.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30636612355 = 5 ⋅6127322471.

It is a cyclic number.

It is not a de Polignac number, because 55321663603 - 2¹ = 55321663601 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55321663601) 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, 557851 + ... + 649492.

It is an arithmetic number, because the mean of its divisors is an integer number (13830729192).

Almost surely, 2^55321663603 is an apocalyptic number.

55321663603 is a deficient number, since it is larger than the sum of its proper divisors (1253165).

55321663603 is a wasteful number, since it uses less digits than its factorization.

55321663603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253164.

The product of its (nonzero) digits is 291600, while the sum is 40.

The spelling of 55321663603 in words is "fifty-five billion, three hundred twenty-one million, six hundred sixty-three thousand, six hundred three".