1800168101 has 8 divisors (see below), whose sum is σ = 1829319960. Its totient is φ = 1771137792.

The previous prime is 1800168059. The next prime is 1800168119. The reversal of 1800168101 is 1018610081.

It can be written as a sum of positive squares in 4 ways, for example, as 548777476 + 1251390625 = 23426^2 + 35375^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1800168101 - 2²² = 1795973797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1800168401) 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, 290 + ... + 60003.

It is an arithmetic number, because the mean of its divisors is an integer number (228664995).

Almost surely, 2^1800168101 is an apocalyptic number.

It is an amenable number.

1800168101 is a deficient number, since it is larger than the sum of its proper divisors (29151859).

1800168101 is an equidigital number, since it uses as much as digits as its factorization.

1800168101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60775.

The product of its (nonzero) digits is 384, while the sum is 26.

The square root of 1800168101 is about 42428.3879142255. The cubic root of 1800168101 is about 1216.4782655003.

Adding to 1800168101 its reverse (1018610081), we get a palindrome (2818778182).

The spelling of 1800168101 in words is "one billion, eight hundred million, one hundred sixty-eight thousand, one hundred one".