280749997315216 has 225 divisors, whose sum is σ = 648155127243945. Its totient is φ = 117752966897280.

The previous prime is 280749997315187. The next prime is 280749997315219. The reversal of 280749997315216 is 612513799947082.

The square root of 280749997315216 is 16755596.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 41531064691600 + 239218932623616 = 6444460^2 + 15466704^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (280749997315219) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 105426208701 + ... + 105426211363.

It is a 1-persistent number, because it is pandigital, but 2⋅280749997315216 = 561499994630432 is not.

Almost surely, 2^{280749997315216} is an apocalyptic number.

280749997315216 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

280749997315216 is the 16755596-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 280749997315216

280749997315216 is an abundant number, since it is smaller than the sum of its proper divisors (367405129928729).

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

280749997315216 is an frugal number, since it uses more digits than its factorization.

280749997315216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5404 (or 2689 counting only the distinct ones).

The product of its (nonzero) digits is 411505920, while the sum is 73.

The spelling of 280749997315216 in words is "two hundred eighty trillion, seven hundred forty-nine billion, nine hundred ninety-seven million, three hundred fifteen thousand, two hundred sixteen".