16550564903 has 4 divisors (see below), whose sum is σ = 16550864328. Its totient is φ = 16550265480.

The previous prime is 16550564873. The next prime is 16550564923. The reversal of 16550564903 is 30946505561.

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

It is a cyclic number.

It is not a de Polignac number, because 16550564903 - 2⁶ = 16550564839 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 (16550564923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40001 + ... + 186282.

It is an arithmetic number, because the mean of its divisors is an integer number (4137716082).

Almost surely, 2^16550564903 is an apocalyptic number.

16550564903 is a deficient number, since it is larger than the sum of its proper divisors (299425).

16550564903 is an equidigital number, since it uses as much as digits as its factorization.

16550564903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299424.

The product of its (nonzero) digits is 486000, while the sum is 44.

The spelling of 16550564903 in words is "sixteen billion, five hundred fifty million, five hundred sixty-four thousand, nine hundred three".