1601601617 has 32 divisors (see below), whose sum is σ = 2023037184. Its totient is φ = 1241982720.

The previous prime is 1601601613. The next prime is 1601601623. The reversal of 1601601617 is 7161061061.

It is not a de Polignac number, because 1601601617 - 2² = 1601601613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1601601617.

It is not an unprimeable number, because it can be changed into a prime (1601601611) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3698633 + ... + 3699065.

It is an arithmetic number, because the mean of its divisors is an integer number (63219912).

Almost surely, 2^1601601617 is an apocalyptic number.

It is an amenable number.

1601601617 is a deficient number, since it is larger than the sum of its proper divisors (421435567).

1601601617 is an equidigital number, since it uses as much as digits as its factorization.

1601601617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870 (or 848 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 1601601617 is about 40020.0152048947. The cubic root of 1601601617 is about 1169.9972281815.

Adding to 1601601617 its reverse (7161061061), we get a palindrome (8762662678).

It can be divided in two parts, 16016016 and 17, that multiplied together give a palindrome (272272272).

The spelling of 1601601617 in words is "one billion, six hundred one million, six hundred one thousand, six hundred seventeen".