609945161 has 16 divisors (see below), whose sum is σ = 715573248. Its totient is φ = 509112000.

The previous prime is 609945121. The next prime is 609945199. The reversal of 609945161 is 161549906.

It is a cyclic number.

It is not a de Polignac number, because 609945161 - 2¹⁴ = 609928777 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (609945101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36056 + ... + 50198.

It is an arithmetic number, because the mean of its divisors is an integer number (44723328).

Almost surely, 2^609945161 is an apocalyptic number.

609945161 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

609945161 is a deficient number, since it is larger than the sum of its proper divisors (105628087).

609945161 is a wasteful number, since it uses less digits than its factorization.

609945161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14312.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 609945161 is about 24697.0678624002. The cubic root of 609945161 is about 848.0671935787.

The spelling of 609945161 in words is "six hundred nine million, nine hundred forty-five thousand, one hundred sixty-one".