9916550280 has 1024 divisors, whose sum is σ = 43893964800. Its totient is φ = 1934254080.

The previous prime is 9916550263. The next prime is 9916550297. The reversal of 9916550280 is 820556199.

9916550280 is a `hidden beast` number, since 9 + 9 + 1 + 65 + 502 + 80 = 666.

It is an interprime number because it is at equal distance from previous prime (9916550263) and next prime (9916550297).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 92677987 + ... + 92678093.

It is an arithmetic number, because the mean of its divisors is an integer number (42865200).

Almost surely, 2^9916550280 is an apocalyptic number.

9916550280 is a gapful number since it is divisible by the number (90) 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 9916550280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21946982400).

9916550280 is an abundant number, since it is smaller than the sum of its proper divisors (33977414520).

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

9916550280 is a wasteful number, since it uses less digits than its factorization.

9916550280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211 (or 201 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 45.

The square root of 9916550280 is about 99581.8772669003. The cubic root of 9916550280 is about 2148.4250430684.

The spelling of 9916550280 in words is "nine billion, nine hundred sixteen million, five hundred fifty thousand, two hundred eighty".