778082457 has 16 divisors (see below), whose sum is σ = 1057710080. Its totient is φ = 508658832.

The previous prime is 778082413. The next prime is 778082467. The reversal of 778082457 is 754280877.

It is a happy number.

It is not a de Polignac number, because 778082457 - 2¹⁵ = 778049689 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (778082467) 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 in 15 ways as a sum of consecutive naturals, for example, 36144 + ... + 53502.

It is an arithmetic number, because the mean of its divisors is an integer number (66106880).

Almost surely, 2^778082457 is an apocalyptic number.

It is an amenable number.

778082457 is a deficient number, since it is larger than the sum of its proper divisors (279627623).

778082457 is a wasteful number, since it uses less digits than its factorization.

778082457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17652.

The product of its (nonzero) digits is 878080, while the sum is 48.

The square root of 778082457 is about 27894.1294361376. The cubic root of 778082457 is about 919.7614602892.

The spelling of 778082457 in words is "seven hundred seventy-eight million, eighty-two thousand, four hundred fifty-seven".