15401521040449 has 2 divisors, whose sum is σ = 15401521040450. Its totient is φ = 15401521040448.

The previous prime is 15401521040407. The next prime is 15401521040459. The reversal of 15401521040449 is 94404012510451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9770581878849 + 5630939161600 = 3125793^2 + 2372960^2 .

It is a cyclic number.

It is not a de Polignac number, because 15401521040449 - 2¹¹ = 15401521038401 is a prime.

It is not a weakly prime, because it can be changed into another prime (15401521040459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7700760520224 + 7700760520225.

It is an arithmetic number, because the mean of its divisors is an integer number (7700760520225).

Almost surely, 2^{15401521040449} is an apocalyptic number.

It is an amenable number.

15401521040449 is a deficient number, since it is larger than the sum of its proper divisors (1).

15401521040449 is an equidigital number, since it uses as much as digits as its factorization.

15401521040449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 115200, while the sum is 40.

The spelling of 15401521040449 in words is "fifteen trillion, four hundred one billion, five hundred twenty-one million, forty thousand, four hundred forty-nine".