1608656161 has 8 divisors (see below), whose sum is σ = 1946609280. Its totient is φ = 1297739328.

The previous prime is 1608656113. The next prime is 1608656167. The reversal of 1608656161 is 1616568061.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1608656161 - 2⁹ = 1608655649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1608656167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6758941 + ... + 6759178.

It is an arithmetic number, because the mean of its divisors is an integer number (243326160).

Almost surely, 2^1608656161 is an apocalyptic number.

It is an amenable number.

1608656161 is a deficient number, since it is larger than the sum of its proper divisors (337953119).

1608656161 is a wasteful number, since it uses less digits than its factorization.

1608656161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13518143.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 1608656161 is about 40108.0560610958. The cubic root of 1608656161 is about 1171.7125336522.

The spelling of 1608656161 in words is "one billion, six hundred eight million, six hundred fifty-six thousand, one hundred sixty-one".