545158961 has 4 divisors (see below), whose sum is σ = 545223924. Its totient is φ = 545094000.

The previous prime is 545158951. The next prime is 545158979. The reversal of 545158961 is 169851545.

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 413919025 + 131239936 = 20345^2 + 11456^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-545158961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (545158921) 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, 17630 + ... + 37431.

It is an arithmetic number, because the mean of its divisors is an integer number (136305981).

Almost surely, 2^545158961 is an apocalyptic number.

It is an amenable number.

545158961 is a deficient number, since it is larger than the sum of its proper divisors (64963).

545158961 is an equidigital number, since it uses as much as digits as its factorization.

545158961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64962.

The product of its digits is 216000, while the sum is 44.

The square root of 545158961 is about 23348.6393821996. The cubic root of 545158961 is about 816.9103247597.

The spelling of 545158961 in words is "five hundred forty-five million, one hundred fifty-eight thousand, nine hundred sixty-one".