2555609261 has 2 divisors, whose sum is σ = 2555609262. Its totient is φ = 2555609260.

The previous prime is 2555609237. The next prime is 2555609263. The reversal of 2555609261 is 1629065552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2151197161 + 404412100 = 46381^2 + 20110^2 .

It is a cyclic number.

It is not a de Polignac number, because 2555609261 - 2¹⁸ = 2555347117 is a prime.

It is a super-2 number, since 2×2555609261² = 13062277389817932242, which contains 22 as substring.

Together with 2555609263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2555609263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1277804630 + 1277804631.

It is an arithmetic number, because the mean of its divisors is an integer number (1277804631).

Almost surely, 2^2555609261 is an apocalyptic number.

It is an amenable number.

2555609261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2555609261 is an equidigital number, since it uses as much as digits as its factorization.

2555609261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162000, while the sum is 41.

The square root of 2555609261 is about 50553.0341423737. The cubic root of 2555609261 is about 1367.1982204027.

The spelling of 2555609261 in words is "two billion, five hundred fifty-five million, six hundred nine thousand, two hundred sixty-one".