1800000000001 has 16 divisors (see below), whose sum is σ = 2062841639040. Its totient is φ = 1538588661120.

The previous prime is 1799999999977. The next prime is 1800000000047. The reversal of 1800000000001 is 1000000000081.

It is not a de Polignac number, because 1800000000001 - 2⁵ = 1799999999969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1799999999897 and 1799999999906.

It is not an unprimeable number, because it can be changed into a prime (1800000000101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3633805 + ... + 4099333.

It is an arithmetic number, because the mean of its divisors is an integer number (128927602440).

Almost surely, 2^{1800000000001} is an apocalyptic number.

It is an amenable number.

1800000000001 is a deficient number, since it is larger than the sum of its proper divisors (262841639039).

1800000000001 is an equidigital number, since it uses as much as digits as its factorization.

1800000000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467064.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1800000000001 its reverse (1000000000081), we get a palindrome (2800000000082).

The spelling of 1800000000001 in words is "one trillion, eight hundred billion, one", and thus it is an aban number.