280505255903 has 2 divisors, whose sum is σ = 280505255904. Its totient is φ = 280505255902.

The previous prime is 280505255869. The next prime is 280505255911. The reversal of 280505255903 is 309552505082.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 280505255903 - 2¹⁶ = 280505190367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280505255923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140252627951 + 140252627952.

It is an arithmetic number, because the mean of its divisors is an integer number (140252627952).

Almost surely, 2^280505255903 is an apocalyptic number.

280505255903 is a deficient number, since it is larger than the sum of its proper divisors (1).

280505255903 is an equidigital number, since it uses as much as digits as its factorization.

280505255903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540000, while the sum is 44.

The spelling of 280505255903 in words is "two hundred eighty billion, five hundred five million, two hundred fifty-five thousand, nine hundred three".