508778041489 has 2 divisors, whose sum is σ = 508778041490. Its totient is φ = 508778041488.

The previous prime is 508778041487. The next prime is 508778041537. The reversal of 508778041489 is 984140877805.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 493393856400 + 15384185089 = 702420^2 + 124033^2 .

It is a cyclic number.

It is not a de Polignac number, because 508778041489 - 2¹ = 508778041487 is a prime.

Together with 508778041487, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (508778041487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254389020744 + 254389020745.

It is an arithmetic number, because the mean of its divisors is an integer number (254389020745).

Almost surely, 2^508778041489 is an apocalyptic number.

It is an amenable number.

508778041489 is a deficient number, since it is larger than the sum of its proper divisors (1).

508778041489 is an equidigital number, since it uses as much as digits as its factorization.

508778041489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18063360, while the sum is 61.

The spelling of 508778041489 in words is "five hundred eight billion, seven hundred seventy-eight million, forty-one thousand, four hundred eighty-nine".