5521663506403 has 4 divisors (see below), whose sum is σ = 6023632916088. Its totient is φ = 5019694096720.

The previous prime is 5521663506397. The next prime is 5521663506409. The reversal of 5521663506403 is 3046053661255.

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

It is an interprime number because it is at equal distance from previous prime (5521663506397) and next prime (5521663506409).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5521663506403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5521663506409) 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 3 ways as a sum of consecutive naturals, for example, 250984704826 + ... + 250984704847.

It is an arithmetic number, because the mean of its divisors is an integer number (1505908229022).

Almost surely, 2^{5521663506403} is an apocalyptic number.

5521663506403 is a deficient number, since it is larger than the sum of its proper divisors (501969409685).

5521663506403 is a wasteful number, since it uses less digits than its factorization.

5521663506403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501969409684.

The product of its (nonzero) digits is 1944000, while the sum is 46.

The spelling of 5521663506403 in words is "five trillion, five hundred twenty-one billion, six hundred sixty-three million, five hundred six thousand, four hundred three".