280578982242064 has 135 divisors (see below), whose sum is σ = 614180435913471. Its totient is φ = 124076924421120.

The previous prime is 280578982242043. The next prime is 280578982242073. The reversal of 280578982242064 is 460242289875082.

The square root of 280578982242064 is 16750492.

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

It can be written as a sum of positive squares in 4 ways, for example, as 173178756867600 + 107400225374464 = 13159740^2 + 10363408^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 27269795832 + ... + 27269806120.

Almost surely, 2^{280578982242064} is an apocalyptic number.

280578982242064 is the 16750492-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 280578982242064

280578982242064 is an abundant number, since it is smaller than the sum of its proper divisors (333601453671407).

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

280578982242064 is an frugal number, since it uses more digits than its factorization.

280578982242064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20682 (or 10339 counting only the distinct ones).

The product of its (nonzero) digits is 247726080, while the sum is 67.

The spelling of 280578982242064 in words is "two hundred eighty trillion, five hundred seventy-eight billion, nine hundred eighty-two million, two hundred forty-two thousand, sixty-four".