163553280 has 224 divisors, whose sum is σ = 575633088. Its totient is φ = 39649280.

The previous prime is 163553219. The next prime is 163553293. The reversal of 163553280 is 82355361.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14868475 + ... + 14868485.

Almost surely, 2^163553280 is an apocalyptic number.

163553280 is a gapful number since it is divisible by the number (10) 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 163553280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (287816544).

163553280 is an abundant number, since it is smaller than the sum of its proper divisors (412079808).

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

163553280 is an frugal number, since it uses more digits than its factorization.

163553280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67 (or 21 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 163553280 is about 12788.7950957078. The cubic root of 163553280 is about 546.8729210479.

The spelling of 163553280 in words is "one hundred sixty-three million, five hundred fifty-three thousand, two hundred eighty".