4000815449 has 2 divisors, whose sum is σ = 4000815450. Its totient is φ = 4000815448.

The previous prime is 4000815373. The next prime is 4000815463. The reversal of 4000815449 is 9445180004.

It is a happy number.

4000815449 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3150801424 + 850014025 = 56132^2 + 29155^2 .

It is a cyclic number.

It is not a de Polignac number, because 4000815449 - 2¹⁶ = 4000749913 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (4000815499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2000407724 + 2000407725.

It is an arithmetic number, because the mean of its divisors is an integer number (2000407725).

Almost surely, 2^4000815449 is an apocalyptic number.

It is an amenable number.

4000815449 is a deficient number, since it is larger than the sum of its proper divisors (1).

4000815449 is an equidigital number, since it uses as much as digits as its factorization.

4000815449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 4000815449 is about 63251.9995652311. Note that the first 3 decimals coincide. The cubic root of 4000815449 is about 1587.5089150222.

The spelling of 4000815449 in words is "four billion, eight hundred fifteen thousand, four hundred forty-nine".