260505575777 has 2 divisors, whose sum is σ = 260505575778. Its totient is φ = 260505575776.

The previous prime is 260505575713. The next prime is 260505575791. The reversal of 260505575777 is 777575505062.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189855404176 + 70650171601 = 435724^2 + 265801^2 .

It is a cyclic number.

It is not a de Polignac number, because 260505575777 - 2⁶ = 260505575713 is a prime.

It is not a weakly prime, because it can be changed into another prime (260505475777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130252787888 + 130252787889.

It is an arithmetic number, because the mean of its divisors is an integer number (130252787889).

Almost surely, 2^260505575777 is an apocalyptic number.

It is an amenable number.

260505575777 is a deficient number, since it is larger than the sum of its proper divisors (1).

260505575777 is an equidigital number, since it uses as much as digits as its factorization.

260505575777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18007500, while the sum is 56.

The spelling of 260505575777 in words is "two hundred sixty billion, five hundred five million, five hundred seventy-five thousand, seven hundred seventy-seven".