1601320801 has 4 divisors (see below), whose sum is σ = 1613009412. Its totient is φ = 1589632192.

The previous prime is 1601320781. The next prime is 1601320823. The reversal of 1601320801 is 1080231061.

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 405821025 + 1195499776 = 20145^2 + 34576^2 .

It is a cyclic number.

It is not a de Polignac number, because 1601320801 - 2⁵ = 1601320769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1601320871) 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, 5844100 + ... + 5844373.

It is an arithmetic number, because the mean of its divisors is an integer number (403252353).

Almost surely, 2^1601320801 is an apocalyptic number.

It is an amenable number.

1601320801 is a deficient number, since it is larger than the sum of its proper divisors (11688611).

1601320801 is a wasteful number, since it uses less digits than its factorization.

1601320801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11688610.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 1601320801 is about 40016.5066066492. The cubic root of 1601320801 is about 1169.9288438962.

Adding to 1601320801 its reverse (1080231061), we get a palindrome (2681551862).

The spelling of 1601320801 in words is "one billion, six hundred one million, three hundred twenty thousand, eight hundred one".