505406240099 has 2 divisors, whose sum is σ = 505406240100. Its totient is φ = 505406240098.

The previous prime is 505406240077. The next prime is 505406240117. The reversal of 505406240099 is 990042604505.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 505406240099 - 2²⁴ = 505389462883 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (505406240299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252703120049 + 252703120050.

It is an arithmetic number, because the mean of its divisors is an integer number (252703120050).

Almost surely, 2^505406240099 is an apocalyptic number.

505406240099 is a deficient number, since it is larger than the sum of its proper divisors (1).

505406240099 is an equidigital number, since it uses as much as digits as its factorization.

505406240099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 388800, while the sum is 44.

The spelling of 505406240099 in words is "five hundred five billion, four hundred six million, two hundred forty thousand, ninety-nine".