778483855 has 4 divisors (see below), whose sum is σ = 934180632. Its totient is φ = 622787080.

The previous prime is 778483841. The next prime is 778483883. The reversal of 778483855 is 558384877.

It is a happy number.

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

It is not a de Polignac number, because 778483855 - 2²¹ = 776386703 is a prime.

It is a super-2 number, since 2×778483855² = 1212074224991322050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 778483796 and 778483805.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77848381 + ... + 77848390.

It is an arithmetic number, because the mean of its divisors is an integer number (233545158).

Almost surely, 2^778483855 is an apocalyptic number.

778483855 is a deficient number, since it is larger than the sum of its proper divisors (155696777).

778483855 is a wasteful number, since it uses less digits than its factorization.

778483855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155696776.

The product of its digits is 7526400, while the sum is 55.

The square root of 778483855 is about 27901.3235349150. The cubic root of 778483855 is about 919.9195956039.

The spelling of 778483855 in words is "seven hundred seventy-eight million, four hundred eighty-three thousand, eight hundred fifty-five".