1818908801 has 2 divisors, whose sum is σ = 1818908802. Its totient is φ = 1818908800.

The previous prime is 1818908771. The next prime is 1818908821. The reversal of 1818908801 is 1088098181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1728563776 + 90345025 = 41576^2 + 9505^2 .

It is an emirp because it is prime and its reverse (1088098181) is a distict prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 1088068181 and 1818608801.

It is a cyclic number.

It is not a de Polignac number, because 1818908801 - 2⁶ = 1818908737 is a prime.

It is not a weakly prime, because it can be changed into another prime (1818908821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 909454400 + 909454401.

It is an arithmetic number, because the mean of its divisors is an integer number (909454401).

Almost surely, 2^1818908801 is an apocalyptic number.

It is an amenable number.

1818908801 is a deficient number, since it is larger than the sum of its proper divisors (1).

1818908801 is an equidigital number, since it uses as much as digits as its factorization.

1818908801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36864, while the sum is 44.

The square root of 1818908801 is about 42648.6670483381. The cubic root of 1818908801 is about 1220.6850942494.

The spelling of 1818908801 in words is "one billion, eight hundred eighteen million, nine hundred eight thousand, eight hundred one".