1808121268801 has 8 divisors (see below), whose sum is σ = 1874790083880. Its totient is φ = 1741740440832.

The previous prime is 1808121268799. The next prime is 1808121268813. The reversal of 1808121268801 is 1088621218081.

It can be written as a sum of positive squares in 4 ways, for example, as 51372489025 + 1756748779776 = 226655^2 + 1325424^2 .

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 1808121268801 - 2¹ = 1808121268799 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1808121268831) 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, 71983990 + ... + 72009103.

It is an arithmetic number, because the mean of its divisors is an integer number (234348760485).

Almost surely, 2^{1808121268801} is an apocalyptic number.

It is an amenable number.

1808121268801 is a deficient number, since it is larger than the sum of its proper divisors (66668815079).

1808121268801 is a wasteful number, since it uses less digits than its factorization.

1808121268801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143993555.

The product of its (nonzero) digits is 98304, while the sum is 46.

The spelling of 1808121268801 in words is "one trillion, eight hundred eight billion, one hundred twenty-one million, two hundred sixty-eight thousand, eight hundred one".