280989485793 has 12 divisors (see below), whose sum is σ = 412527369748. Its totient is φ = 184255400160.

The previous prime is 280989485713. The next prime is 280989485801. The reversal of 280989485793 is 397584989082.

280989485793 is a `hidden beast` number, since 2 + 8 + 0 + 9 + 8 + 9 + 48 + 579 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 57687873489 + 223301612304 = 240183^2 + 472548^2 .

It is not a de Polignac number, because 280989485793 - 2¹⁸ = 280989223649 is a prime.

It is a super-2 number, since 2×280989485793² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (280989485713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 255909730 + ... + 255910827.

Almost surely, 2^280989485793 is an apocalyptic number.

It is an amenable number.

280989485793 is a deficient number, since it is larger than the sum of its proper divisors (131537883955).

280989485793 is a wasteful number, since it uses less digits than its factorization.

280989485793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511820624 (or 511820621 counting only the distinct ones).

The product of its (nonzero) digits is 313528320, while the sum is 72.

The spelling of 280989485793 in words is "two hundred eighty billion, nine hundred eighty-nine million, four hundred eighty-five thousand, seven hundred ninety-three".