778481263 has 4 divisors (see below), whose sum is σ = 889692880. Its totient is φ = 667269648.

The previous prime is 778481233. The next prime is 778481267. The reversal of 778481263 is 362184877.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 778481263 - 2²⁹ = 241610351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778481267) 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 in 3 ways as a sum of consecutive naturals, for example, 55605798 + ... + 55605811.

It is an arithmetic number, because the mean of its divisors is an integer number (222423220).

Almost surely, 2^778481263 is an apocalyptic number.

778481263 is a deficient number, since it is larger than the sum of its proper divisors (111211617).

778481263 is a wasteful number, since it uses less digits than its factorization.

778481263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111211616.

The product of its digits is 451584, while the sum is 46.

The square root of 778481263 is about 27901.2770854669. The cubic root of 778481263 is about 919.9185746304.

The spelling of 778481263 in words is "seven hundred seventy-eight million, four hundred eighty-one thousand, two hundred sixty-three".