16550565888 has 48 divisors (see below), whose sum is σ = 44124083640. Its totient is φ = 5516853248.

The previous prime is 16550565881. The next prime is 16550565907. The reversal of 16550565888 is 88856505561.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16550565881) 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, 1340745 + ... + 1353032.

Almost surely, 2^16550565888 is an apocalyptic number.

It is an amenable number.

16550565888 is an abundant number, since it is smaller than the sum of its proper divisors (27573517752).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16550565888 is an equidigital number, since it uses as much as digits as its factorization.

16550565888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2693802 (or 2693782 counting only the distinct ones).

The product of its (nonzero) digits is 11520000, while the sum is 57.

The spelling of 16550565888 in words is "sixteen billion, five hundred fifty million, five hundred sixty-five thousand, eight hundred eighty-eight".