545664461 has 4 divisors (see below), whose sum is σ = 548491932. Its totient is φ = 542836992.

The previous prime is 545664437. The next prime is 545664467. The reversal of 545664461 is 164466545.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 264062500 + 281601961 = 16250^2 + 16781^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-545664461 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 (545664467) 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, 1413446 + ... + 1413831.

It is an arithmetic number, because the mean of its divisors is an integer number (137122983).

Almost surely, 2^545664461 is an apocalyptic number.

It is an amenable number.

545664461 is a deficient number, since it is larger than the sum of its proper divisors (2827471).

545664461 is a wasteful number, since it uses less digits than its factorization.

545664461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2827470.

The product of its digits is 345600, while the sum is 41.

The square root of 545664461 is about 23359.4619158918. The cubic root of 545664461 is about 817.1627408002.

The spelling of 545664461 in words is "five hundred forty-five million, six hundred sixty-four thousand, four hundred sixty-one".