855778516 has 24 divisors (see below), whose sum is σ = 1574664840. Its totient is φ = 406358400.

The previous prime is 855778501. The next prime is 855778571. The reversal of 855778516 is 615877558.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 126562500 + 729216016 = 11250^2 + 27004^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53395 + ... + 67546.

It is an arithmetic number, because the mean of its divisors is an integer number (65611035).

Almost surely, 2^855778516 is an apocalyptic number.

It is an amenable number.

855778516 is a deficient number, since it is larger than the sum of its proper divisors (718886324).

855778516 is a wasteful number, since it uses less digits than its factorization.

855778516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121035 (or 121033 counting only the distinct ones).

The product of its digits is 2352000, while the sum is 52.

The square root of 855778516 is about 29253.6923481464. The cubic root of 855778516 is about 949.4099811845.

The spelling of 855778516 in words is "eight hundred fifty-five million, seven hundred seventy-eight thousand, five hundred sixteen".