557098561 has 4 divisors (see below), whose sum is σ = 557922132. Its totient is φ = 556274992.

The previous prime is 557098547. The next prime is 557098609. The reversal of 557098561 is 165890755.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 165890755 = 5 ⋅33178151.

It can be written as a sum of positive squares in 2 ways, for example, as 418447936 + 138650625 = 20456^2 + 11775^2 .

It is a cyclic number.

It is not a de Polignac number, because 557098561 - 2⁹ = 557098049 is a prime.

It is a super-3 number, since 3×557098561³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (557098511) 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, 410770 + ... + 412123.

It is an arithmetic number, because the mean of its divisors is an integer number (139480533).

Almost surely, 2^557098561 is an apocalyptic number.

It is an amenable number.

557098561 is a deficient number, since it is larger than the sum of its proper divisors (823571).

557098561 is an equidigital number, since it uses as much as digits as its factorization.

557098561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823570.

The product of its (nonzero) digits is 378000, while the sum is 46.

The square root of 557098561 is about 23602.9354318483. The cubic root of 557098561 is about 822.8310636539.

The spelling of 557098561 in words is "five hundred fifty-seven million, ninety-eight thousand, five hundred sixty-one".