541561689 has 12 divisors (see below), whose sum is σ = 809230500. Its totient is φ = 348591264.

The previous prime is 541561681. The next prime is 541561733. The reversal of 541561689 is 986165145.

541561689 is a `hidden beast` number, since 5 + 4 + 1 + 561 + 6 + 89 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 88510464 + 453051225 = 9408^2 + 21285^2 .

It is not a de Polignac number, because 541561689 - 2³ = 541561681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (541561681) 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 11 ways as a sum of consecutive naturals, for example, 1037214 + ... + 1037735.

It is an arithmetic number, because the mean of its divisors is an integer number (67435875).

Almost surely, 2^541561689 is an apocalyptic number.

It is an amenable number.

541561689 is a deficient number, since it is larger than the sum of its proper divisors (267668811).

541561689 is a wasteful number, since it uses less digits than its factorization.

541561689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2074984 (or 2074981 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 541561689 is about 23271.4780149435. The cubic root of 541561689 is about 815.1095435328.

The spelling of 541561689 in words is "five hundred forty-one million, five hundred sixty-one thousand, six hundred eighty-nine".