2555709697 has 2 divisors, whose sum is σ = 2555709698. Its totient is φ = 2555709696.

The previous prime is 2555709679. The next prime is 2555709713. The reversal of 2555709697 is 7969075552.

Together with previous prime (2555709679) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2520140401 + 35569296 = 50201^2 + 5964^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2555709697 is a prime.

It is not a weakly prime, because it can be changed into another prime (2555749697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1277854848 + 1277854849.

It is an arithmetic number, because the mean of its divisors is an integer number (1277854849).

Almost surely, 2^2555709697 is an apocalyptic number.

It is an amenable number.

2555709697 is a deficient number, since it is larger than the sum of its proper divisors (1).

2555709697 is an equidigital number, since it uses as much as digits as its factorization.

2555709697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5953500, while the sum is 55.

The square root of 2555709697 is about 50554.0275052344. The cubic root of 2555709697 is about 1367.2161305640.

The spelling of 2555709697 in words is "two billion, five hundred fifty-five million, seven hundred nine thousand, six hundred ninety-seven".