505944490867 has 2 divisors, whose sum is σ = 505944490868. Its totient is φ = 505944490866.

The previous prime is 505944490823. The next prime is 505944490907. The reversal of 505944490867 is 768094449505.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505944490867 is a prime.

It is not a weakly prime, because it can be changed into another prime (505944490567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252972245433 + 252972245434.

It is an arithmetic number, because the mean of its divisors is an integer number (252972245434).

Almost surely, 2^505944490867 is an apocalyptic number.

505944490867 is a deficient number, since it is larger than the sum of its proper divisors (1).

505944490867 is an equidigital number, since it uses as much as digits as its factorization.

505944490867 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43545600, while the sum is 61.

The spelling of 505944490867 in words is "five hundred five billion, nine hundred forty-four million, four hundred ninety thousand, eight hundred sixty-seven".