5561778 has 8 divisors (see below), whose sum is σ = 11123568. Its totient is φ = 1853924.

The previous prime is 5561719. The next prime is 5561779. The reversal of 5561778 is 8771655.

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

5561778 is an admirable number.

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5561779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 463476 + ... + 463487.

It is an arithmetic number, because the mean of its divisors is an integer number (1390446).

Almost surely, 2^5561778 is an apocalyptic number.

5561778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5561778 is a wasteful number, since it uses less digits than its factorization.

5561778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926968.

The product of its digits is 58800, while the sum is 39.

The square root of 5561778 is about 2358.3422143531. The cubic root of 5561778 is about 177.1758601980.

The spelling of 5561778 in words is "five million, five hundred sixty-one thousand, seven hundred seventy-eight".