603656161 has 4 divisors (see below), whose sum is σ = 618379524. Its totient is φ = 588932800.

The previous prime is 603656107. The next prime is 603656171. The reversal of 603656161 is 161656306.

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 230432400 + 373223761 = 15180^2 + 19319^2 .

It is a cyclic number.

It is not a de Polignac number, because 603656161 - 2⁷ = 603656033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (603656101) 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, 7361620 + ... + 7361701.

It is an arithmetic number, because the mean of its divisors is an integer number (154594881).

Almost surely, 2^603656161 is an apocalyptic number.

It is an amenable number.

603656161 is a deficient number, since it is larger than the sum of its proper divisors (14723363).

603656161 is a wasteful number, since it uses less digits than its factorization.

603656161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14723362.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 603656161 is about 24569.4151538045. The cubic root of 603656161 is about 845.1423781188.

The spelling of 603656161 in words is "six hundred three million, six hundred fifty-six thousand, one hundred sixty-one".