56778685 has 8 divisors (see below), whose sum is σ = 68592600. Its totient is φ = 45117504.

The previous prime is 56778677. The next prime is 56778703. The reversal of 56778685 is 58687765.

It can be written as a sum of positive squares in 4 ways, for example, as 1737124 + 55041561 = 1318^2 + 7419^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56778685 - 2³ = 56778677 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 37362 + ... + 38851.

It is an arithmetic number, because the mean of its divisors is an integer number (8574075).

Almost surely, 2^56778685 is an apocalyptic number.

It is an amenable number.

56778685 is a deficient number, since it is larger than the sum of its proper divisors (11813915).

56778685 is a wasteful number, since it uses less digits than its factorization.

56778685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76367.

The product of its digits is 2822400, while the sum is 52.

The square root of 56778685 is about 7535.1632364535. The cubic root of 56778685 is about 384.3513787674.

The spelling of 56778685 in words is "fifty-six million, seven hundred seventy-eight thousand, six hundred eighty-five".