505642245947 has 2 divisors, whose sum is σ = 505642245948. Its totient is φ = 505642245946.

The previous prime is 505642245907. The next prime is 505642246097. The reversal of 505642245947 is 749542246505.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 505642245947 - 2¹⁴ = 505642229563 is a prime.

It is not a weakly prime, because it can be changed into another prime (505642245907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252821122973 + 252821122974.

It is an arithmetic number, because the mean of its divisors is an integer number (252821122974).

Almost surely, 2^505642245947 is an apocalyptic number.

505642245947 is a deficient number, since it is larger than the sum of its proper divisors (1).

505642245947 is an equidigital number, since it uses as much as digits as its factorization.

505642245947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096000, while the sum is 53.

The spelling of 505642245947 in words is "five hundred five billion, six hundred forty-two million, two hundred forty-five thousand, nine hundred forty-seven".