778592461891 has 2 divisors, whose sum is σ = 778592461892. Its totient is φ = 778592461890.

The previous prime is 778592461853. The next prime is 778592461903. The reversal of 778592461891 is 198164295877.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 778592461891 - 2³⁷ = 641153508419 is a prime.

It is not a weakly prime, because it can be changed into another prime (778592461811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 389296230945 + 389296230946.

It is an arithmetic number, because the mean of its divisors is an integer number (389296230946).

Almost surely, 2^778592461891 is an apocalyptic number.

778592461891 is a deficient number, since it is larger than the sum of its proper divisors (1).

778592461891 is an equidigital number, since it uses as much as digits as its factorization.

778592461891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60963840, while the sum is 67.

The spelling of 778592461891 in words is "seven hundred seventy-eight billion, five hundred ninety-two million, four hundred sixty-one thousand, eight hundred ninety-one".