556780685 has 8 divisors (see below), whose sum is σ = 707439096. Its totient is φ = 419223040.

The previous prime is 556780673. The next prime is 556780687. The reversal of 556780685 is 586087655.

556780685 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 238300969 + 318479716 = 15437^2 + 17846^2 .

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

It is not a de Polignac number, because 556780685 - 2⁴ = 556780669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556780687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3275096 + ... + 3275265.

It is an arithmetic number, because the mean of its divisors is an integer number (88429887).

Almost surely, 2^556780685 is an apocalyptic number.

It is an amenable number.

556780685 is a deficient number, since it is larger than the sum of its proper divisors (150658411).

556780685 is a wasteful number, since it uses less digits than its factorization.

556780685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6550383.

The product of its (nonzero) digits is 2016000, while the sum is 50.

The square root of 556780685 is about 23596.2006475619. The cubic root of 556780685 is about 822.6745335956.

The spelling of 556780685 in words is "five hundred fifty-six million, seven hundred eighty thousand, six hundred eighty-five".