280869265768 has 48 divisors (see below), whose sum is σ = 659734138980. Its totient is φ = 111113114112.

The previous prime is 280869265757. The next prime is 280869265793. The reversal of 280869265768 is 867562968082.

It can be written as a sum of positive squares in 2 ways, for example, as 276022042884 + 4847222884 = 525378^2 + 69622^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27552721 + ... + 27562912.

Almost surely, 2^280869265768 is an apocalyptic number.

280869265768 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

280869265768 is an abundant number, since it is smaller than the sum of its proper divisors (378864873212).

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

280869265768 is a wasteful number, since it uses less digits than its factorization.

280869265768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55115666 (or 55115655 counting only the distinct ones).

The product of its (nonzero) digits is 139345920, while the sum is 67.

The spelling of 280869265768 in words is "two hundred eighty billion, eight hundred sixty-nine million, two hundred sixty-five thousand, seven hundred sixty-eight".