505556001023 has 2 divisors, whose sum is σ = 505556001024. Its totient is φ = 505556001022.

The previous prime is 505556000977. The next prime is 505556001043. The reversal of 505556001023 is 320100655505.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 505556001023 - 2¹² = 505555996927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505556001043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252778000511 + 252778000512.

It is an arithmetic number, because the mean of its divisors is an integer number (252778000512).

Almost surely, 2^505556001023 is an apocalyptic number.

505556001023 is a deficient number, since it is larger than the sum of its proper divisors (1).

505556001023 is an equidigital number, since it uses as much as digits as its factorization.

505556001023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22500, while the sum is 32.

Adding to 505556001023 its reverse (320100655505), we get a palindrome (825656656528).

The spelling of 505556001023 in words is "five hundred five billion, five hundred fifty-six million, one thousand, twenty-three".