505255778611 has 2 divisors, whose sum is σ = 505255778612. Its totient is φ = 505255778610.

The previous prime is 505255778569. The next prime is 505255778633. The reversal of 505255778611 is 116877552505.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 505255778611 - 2⁷ = 505255778483 is a prime.

It is not a weakly prime, because it can be changed into another prime (505255772611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252627889305 + 252627889306.

It is an arithmetic number, because the mean of its divisors is an integer number (252627889306).

Almost surely, 2^505255778611 is an apocalyptic number.

505255778611 is a deficient number, since it is larger than the sum of its proper divisors (1).

505255778611 is an equidigital number, since it uses as much as digits as its factorization.

505255778611 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2940000, while the sum is 52.

The spelling of 505255778611 in words is "five hundred five billion, two hundred fifty-five million, seven hundred seventy-eight thousand, six hundred eleven".