6004400081 has 2 divisors, whose sum is σ = 6004400082. Its totient is φ = 6004400080.

The previous prime is 6004400057. The next prime is 6004400099. The reversal of 6004400081 is 1800044006.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4911767056 + 1092633025 = 70084^2 + 33055^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6004400081 is a prime.

It is a super-2 number, since 2×6004400081² = 72105640665425613122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6004400011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3002200040 + 3002200041.

It is an arithmetic number, because the mean of its divisors is an integer number (3002200041).

Almost surely, 2^6004400081 is an apocalyptic number.

It is an amenable number.

6004400081 is a deficient number, since it is larger than the sum of its proper divisors (1).

6004400081 is an equidigital number, since it uses as much as digits as its factorization.

6004400081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 6004400081 is about 77488.0641195791. The cubic root of 6004400081 is about 1817.5646775046.

Adding to 6004400081 its reverse (1800044006), we get a palindrome (7804444087).

The spelling of 6004400081 in words is "six billion, four million, four hundred thousand, eighty-one".