778425156559 has 2 divisors, whose sum is σ = 778425156560. Its totient is φ = 778425156558.

The previous prime is 778425156527. The next prime is 778425156643. The reversal of 778425156559 is 955651524877.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 778425156559 - 2⁵ = 778425156527 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 778425156559.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (778425156059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 389212578279 + 389212578280.

It is an arithmetic number, because the mean of its divisors is an integer number (389212578280).

Almost surely, 2^778425156559 is an apocalyptic number.

778425156559 is a deficient number, since it is larger than the sum of its proper divisors (1).

778425156559 is an equidigital number, since it uses as much as digits as its factorization.

778425156559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840000, while the sum is 64.

The spelling of 778425156559 in words is "seven hundred seventy-eight billion, four hundred twenty-five million, one hundred fifty-six thousand, five hundred fifty-nine".