16220505550 has 12 divisors (see below), whose sum is σ = 30170140416. Its totient is φ = 6488202200.

The previous prime is 16220505541. The next prime is 16220505551. The reversal of 16220505550 is 5550502261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16220505551) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 162205006 + ... + 162205105.

It is an arithmetic number, because the mean of its divisors is an integer number (2514178368).

Almost surely, 2^16220505550 is an apocalyptic number.

16220505550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16220505550 is a deficient number, since it is larger than the sum of its proper divisors (13949634866).

16220505550 is a wasteful number, since it uses less digits than its factorization.

16220505550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324410123 (or 324410118 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 31.

The spelling of 16220505550 in words is "sixteen billion, two hundred twenty million, five hundred five thousand, five hundred fifty".