505606615543 has 2 divisors, whose sum is σ = 505606615544. Its totient is φ = 505606615542.

The previous prime is 505606615541. The next prime is 505606615573. The reversal of 505606615543 is 345516606505.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 505606615543 - 2¹ = 505606615541 is a prime.

Together with 505606615541, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 505606615493 and 505606615502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505606615541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252803307771 + 252803307772.

It is an arithmetic number, because the mean of its divisors is an integer number (252803307772).

Almost surely, 2^505606615543 is an apocalyptic number.

505606615543 is a deficient number, since it is larger than the sum of its proper divisors (1).

505606615543 is an equidigital number, since it uses as much as digits as its factorization.

505606615543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620000, while the sum is 46.

The spelling of 505606615543 in words is "five hundred five billion, six hundred six million, six hundred fifteen thousand, five hundred forty-three".