878744738561603 has 2 divisors, whose sum is σ = 878744738561604. Its totient is φ = 878744738561602.

The previous prime is 878744738561561. The next prime is 878744738561633. The reversal of 878744738561603 is 306165837447878.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 878744738561603 - 2¹⁸ = 878744738299459 is a prime.

It is not a weakly prime, because it can be changed into another prime (878744738561633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439372369280801 + 439372369280802.

It is an arithmetic number, because the mean of its divisors is an integer number (439372369280802).

Almost surely, 2^{878744738561603} is an apocalyptic number.

878744738561603 is a deficient number, since it is larger than the sum of its proper divisors (1).

878744738561603 is an equidigital number, since it uses as much as digits as its factorization.

878744738561603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4551966720, while the sum is 77.

The spelling of 878744738561603 in words is "eight hundred seventy-eight trillion, seven hundred forty-four billion, seven hundred thirty-eight million, five hundred sixty-one thousand, six hundred three".