280687720955 has 16 divisors (see below), whose sum is σ = 361242594720. Its totient is φ = 208717936128.

The previous prime is 280687720921. The next prime is 280687720981. The reversal of 280687720955 is 559027786082.

It is a cyclic number.

It is not a de Polignac number, because 280687720955 - 2¹⁰ = 280687719931 is a prime.

It is a super-2 number, since 2×280687720955² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 280687720894 and 280687720903.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27868622 + ... + 27878691.

It is an arithmetic number, because the mean of its divisors is an integer number (22577662170).

Almost surely, 2^280687720955 is an apocalyptic number.

280687720955 is a deficient number, since it is larger than the sum of its proper divisors (80554873765).

280687720955 is a wasteful number, since it uses less digits than its factorization.

280687720955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55747390.

The product of its (nonzero) digits is 16934400, while the sum is 59.

The spelling of 280687720955 in words is "two hundred eighty billion, six hundred eighty-seven million, seven hundred twenty thousand, nine hundred fifty-five".