16220557344 has 144 divisors (see below), whose sum is σ = 45482605056. Its totient is φ = 5060505600.

The previous prime is 16220557343. The next prime is 16220557351. The reversal of 16220557344 is 44375502261.

It is not an unprimeable number, because it can be changed into a prime (16220557343) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5297574 + ... + 5300634.

It is an arithmetic number, because the mean of its divisors is an integer number (315851424).

Almost surely, 2^16220557344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16220557344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22741302528).

16220557344 is an abundant number, since it is smaller than the sum of its proper divisors (29262047712).

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

16220557344 is a wasteful number, since it uses less digits than its factorization.

16220557344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3299 (or 3274 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 39.

The spelling of 16220557344 in words is "sixteen billion, two hundred twenty million, five hundred fifty-seven thousand, three hundred forty-four".