778110491 has 2 divisors, whose sum is σ = 778110492. Its totient is φ = 778110490.

The previous prime is 778110409. The next prime is 778110503. The reversal of 778110491 is 194011877.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 778110491 - 2¹⁸ = 777848347 is a prime.

It is a super-3 number, since 3×778110491³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (778119491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 389055245 + 389055246.

It is an arithmetic number, because the mean of its divisors is an integer number (389055246).

Almost surely, 2^778110491 is an apocalyptic number.

778110491 is a deficient number, since it is larger than the sum of its proper divisors (1).

778110491 is an equidigital number, since it uses as much as digits as its factorization.

778110491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 38.

The square root of 778110491 is about 27894.6319387799. The cubic root of 778110491 is about 919.7725063691.

The spelling of 778110491 in words is "seven hundred seventy-eight million, one hundred ten thousand, four hundred ninety-one".