280985967568 has 40 divisors (see below), whose sum is σ = 551668565952. Its totient is φ = 138632172288.

The previous prime is 280985967553. The next prime is 280985967599. The reversal of 280985967568 is 865769589082.

It is a super-2 number, since 2×280985967568² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (73) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 280985967568.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17730 + ... + 749857.

Almost surely, 2^280985967568 is an apocalyptic number.

It is an amenable number.

280985967568 is a deficient number, since it is larger than the sum of its proper divisors (270682598384).

280985967568 is a wasteful number, since it uses less digits than its factorization.

280985967568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767899 (or 767893 counting only the distinct ones).

The product of its (nonzero) digits is 522547200, while the sum is 73.

The spelling of 280985967568 in words is "two hundred eighty billion, nine hundred eighty-five million, nine hundred sixty-seven thousand, five hundred sixty-eight".