1801601001 has 8 divisors (see below), whose sum is σ = 2669038560. Its totient is φ = 1201067316.

The previous prime is 1801600981. The next prime is 1801601041. The reversal of 1801601001 is 1001061081.

It is not a de Polignac number, because 1801601001 - 2⁷ = 1801600873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1801601041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33362955 + ... + 33363008.

It is an arithmetic number, because the mean of its divisors is an integer number (333629820).

Almost surely, 2^1801601001 is an apocalyptic number.

It is an amenable number.

1801601001 is a deficient number, since it is larger than the sum of its proper divisors (867437559).

1801601001 is an equidigital number, since it uses as much as digits as its factorization.

1801601001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66725972 (or 66725966 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

The square root of 1801601001 is about 42445.2706552803. The cubic root of 1801601001 is about 1216.8009445176.

Adding to 1801601001 its reverse (1001061081), we get a palindrome (2802662082).

The spelling of 1801601001 in words is "one billion, eight hundred one million, six hundred one thousand, one".