280856904007680 has 6120 divisors, whose sum is σ = 1407544537579488. Its totient is φ = 52132891852800.

The previous prime is 280856904007637. The next prime is 280856904007717. The reversal of 280856904007680 is 86700409658082.

280856904007680 is a `hidden beast` number, since 2 + 8 + 0 + 8 + 569 + 0 + 4 + 0 + 0 + 7 + 68 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 359 ways as a sum of consecutive naturals, for example, 9059900129265 + ... + 9059900129295.

Almost surely, 2^{280856904007680} is an apocalyptic number.

280856904007680 is a gapful number since it is divisible by the number (20) 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 280856904007680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (703772268789744).

280856904007680 is an abundant number, since it is smaller than the sum of its proper divisors (1126687633571808).

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

280856904007680 is an equidigital number, since it uses as much as digits as its factorization.

280856904007680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153 (or 72 counting only the distinct ones).

The product of its (nonzero) digits is 46448640, while the sum is 63.

The spelling of 280856904007680 in words is "two hundred eighty trillion, eight hundred fifty-six billion, nine hundred four million, seven thousand, six hundred eighty".