16622253648 has 480 divisors, whose sum is σ = 64787853312. Its totient is φ = 3984422400.

The previous prime is 16622253647. The next prime is 16622253653. The reversal of 16622253648 is 84635222661.

16622253648 is a `hidden beast` number, since 1 + 6 + 62 + 225 + 364 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16622253647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3889753 + ... + 3894023.

Almost surely, 2^16622253648 is an apocalyptic number.

16622253648 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16622253648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32393926656).

16622253648 is an abundant number, since it is smaller than the sum of its proper divisors (48165599664).

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

16622253648 is a wasteful number, since it uses less digits than its factorization.

16622253648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4325 (or 4307 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The spelling of 16622253648 in words is "sixteen billion, six hundred twenty-two million, two hundred fifty-three thousand, six hundred forty-eight".