505603653601 has 2 divisors, whose sum is σ = 505603653602. Its totient is φ = 505603653600.

The previous prime is 505603653563. The next prime is 505603653661. The reversal of 505603653601 is 106356306505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 400707990225 + 104895663376 = 633015^2 + 323876^2 .

It is a cyclic number.

It is not a de Polignac number, because 505603653601 - 2⁷ = 505603653473 is a prime.

It is not a weakly prime, because it can be changed into another prime (505603653661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252801826800 + 252801826801.

It is an arithmetic number, because the mean of its divisors is an integer number (252801826801).

Almost surely, 2^505603653601 is an apocalyptic number.

It is an amenable number.

505603653601 is a deficient number, since it is larger than the sum of its proper divisors (1).

505603653601 is an equidigital number, since it uses as much as digits as its factorization.

505603653601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 243000, while the sum is 40.

The spelling of 505603653601 in words is "five hundred five billion, six hundred three million, six hundred fifty-three thousand, six hundred one".