546541561 has 4 divisors (see below), whose sum is σ = 546588324. Its totient is φ = 546494800.

The previous prime is 546541559. The next prime is 546541621. The reversal of 546541561 is 165145645.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 354192400 + 192349161 = 18820^2 + 13869^2 .

It is a cyclic number.

It is not a de Polignac number, because 546541561 - 2¹ = 546541559 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 546541561.

It is not an unprimeable number, because it can be changed into a prime (546541531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11151 + ... + 34891.

It is an arithmetic number, because the mean of its divisors is an integer number (136647081).

Almost surely, 2^546541561 is an apocalyptic number.

It is an amenable number.

546541561 is a deficient number, since it is larger than the sum of its proper divisors (46763).

546541561 is a wasteful number, since it uses less digits than its factorization.

546541561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46762.

The product of its digits is 72000, while the sum is 37.

The square root of 546541561 is about 23378.2283546038. The cubic root of 546541561 is about 817.6003416877.

The spelling of 546541561 in words is "five hundred forty-six million, five hundred forty-one thousand, five hundred sixty-one".