255500807669 has 2 divisors, whose sum is σ = 255500807670. Its totient is φ = 255500807668.

The previous prime is 255500807623. The next prime is 255500807671. The reversal of 255500807669 is 966708005552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 244987381444 + 10513426225 = 494962^2 + 102535^2 .

It is a cyclic number.

It is not a de Polignac number, because 255500807669 - 2²⁰ = 255499759093 is a prime.

It is a super-2 number, since 2×255500807669² (a number of 24 digits) contains 22 as substring.

Together with 255500807671, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 255500807669.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255500807609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127750403834 + 127750403835.

It is an arithmetic number, because the mean of its divisors is an integer number (127750403835).

Almost surely, 2^255500807669 is an apocalyptic number.

It is an amenable number.

255500807669 is a deficient number, since it is larger than the sum of its proper divisors (1).

255500807669 is an equidigital number, since it uses as much as digits as its factorization.

255500807669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536000, while the sum is 53.

The spelling of 255500807669 in words is "two hundred fifty-five billion, five hundred million, eight hundred seven thousand, six hundred sixty-nine".