2001365601 has 8 divisors (see below), whose sum is σ = 2694908544. Its totient is φ = 1321033200.

The previous prime is 2001365593. The next prime is 2001365617. The reversal of 2001365601 is 1065631002.

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

It is not a de Polignac number, because 2001365601 - 2³ = 2001365593 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2001365101) 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, 3302281 + ... + 3302886.

It is an arithmetic number, because the mean of its divisors is an integer number (336863568).

Almost surely, 2^2001365601 is an apocalyptic number.

It is an amenable number.

2001365601 is a deficient number, since it is larger than the sum of its proper divisors (693542943).

2001365601 is a wasteful number, since it uses less digits than its factorization.

2001365601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6605271.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 2001365601 is about 44736.6248279863. The cubic root of 2001365601 is about 1260.2077428943.

Adding to 2001365601 its reverse (1065631002), we get a palindrome (3066996603).

The spelling of 2001365601 in words is "two billion, one million, three hundred sixty-five thousand, six hundred one".