1603643161 has 8 divisors (see below), whose sum is σ = 1647756704. Its totient is φ = 1559839680.

The previous prime is 1603643147. The next prime is 1603643177. The reversal of 1603643161 is 1613463061.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1603643161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1603643141) 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, 67011 + ... + 87736.

It is an arithmetic number, because the mean of its divisors is an integer number (205969588).

Almost surely, 2^1603643161 is an apocalyptic number.

It is an amenable number.

1603643161 is a deficient number, since it is larger than the sum of its proper divisors (44113543).

1603643161 is a wasteful number, since it uses less digits than its factorization.

1603643161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155031.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 1603643161 is about 40045.5136188812. The cubic root of 1603643161 is about 1170.4941446444.

The spelling of 1603643161 in words is "one billion, six hundred three million, six hundred forty-three thousand, one hundred sixty-one".