280723981975 has 6 divisors (see below), whose sum is σ = 348097737680. Its totient is φ = 224579185560.

The previous prime is 280723981969. The next prime is 280723981997. The reversal of 280723981975 is 579189327082.

It is not a de Polignac number, because 280723981975 - 2¹¹ = 280723979927 is a prime.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 5614479615 + ... + 5614479664.

Almost surely, 2^280723981975 is an apocalyptic number.

280723981975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

280723981975 is a deficient number, since it is larger than the sum of its proper divisors (67373755705).

280723981975 is a wasteful number, since it uses less digits than its factorization.

280723981975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11228959289 (or 11228959284 counting only the distinct ones).

The product of its (nonzero) digits is 15240960, while the sum is 61.

The spelling of 280723981975 in words is "two hundred eighty billion, seven hundred twenty-three million, nine hundred eighty-one thousand, nine hundred seventy-five".