545545961 has 4 divisors (see below), whose sum is σ = 546848400. Its totient is φ = 544243524.

The previous prime is 545545951. The next prime is 545545991. The reversal of 545545961 is 169545545.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-545545961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (545545951) 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, 650591 + ... + 651428.

It is an arithmetic number, because the mean of its divisors is an integer number (136712100).

Almost surely, 2^545545961 is an apocalyptic number.

It is an amenable number.

545545961 is a deficient number, since it is larger than the sum of its proper divisors (1302439).

545545961 is a wasteful number, since it uses less digits than its factorization.

545545961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1302438.

The product of its digits is 540000, while the sum is 44.

The square root of 545545961 is about 23356.9253327573. The cubic root of 545545961 is about 817.1035830808.

The spelling of 545545961 in words is "five hundred forty-five million, five hundred forty-five thousand, nine hundred sixty-one".