500018685541 has 2 divisors, whose sum is σ = 500018685542. Its totient is φ = 500018685540.

The previous prime is 500018685457. The next prime is 500018685571. The reversal of 500018685541 is 145586810005.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 495821589316 + 4197096225 = 704146^2 + 64785^2 .

It is a cyclic number.

It is not a de Polignac number, because 500018685541 - 2⁹ = 500018685029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (500018685571) 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, 250009342770 + 250009342771.

It is an arithmetic number, because the mean of its divisors is an integer number (250009342771).

Almost surely, 2^500018685541 is an apocalyptic number.

It is an amenable number.

500018685541 is a deficient number, since it is larger than the sum of its proper divisors (1).

500018685541 is an equidigital number, since it uses as much as digits as its factorization.

500018685541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192000, while the sum is 43.

The spelling of 500018685541 in words is "five hundred billion, eighteen million, six hundred eighty-five thousand, five hundred forty-one".