56780849 has 4 divisors (see below), whose sum is σ = 57109236. Its totient is φ = 56452464.

The previous prime is 56780821. The next prime is 56780851. The reversal of 56780849 is 94808765.

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

It can be written as a sum of positive squares in 2 ways, for example, as 51940849 + 4840000 = 7207^2 + 2200^2 .

It is a cyclic number.

It is not a de Polignac number, because 56780849 - 2⁸ = 56780593 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56780819) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 163934 + ... + 164279.

It is an arithmetic number, because the mean of its divisors is an integer number (14277309).

Almost surely, 2^56780849 is an apocalyptic number.

It is an amenable number.

56780849 is a deficient number, since it is larger than the sum of its proper divisors (328387).

56780849 is a wasteful number, since it uses less digits than its factorization.

56780849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328386.

The product of its (nonzero) digits is 483840, while the sum is 47.

The square root of 56780849 is about 7535.3068285240. The cubic root of 56780849 is about 384.3562616198.

The spelling of 56780849 in words is "fifty-six million, seven hundred eighty thousand, eight hundred forty-nine".