16411521449 has 2 divisors, whose sum is σ = 16411521450. Its totient is φ = 16411521448.

The previous prime is 16411521433. The next prime is 16411521461. The reversal of 16411521449 is 94412511461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9659941225 + 6751580224 = 98285^2 + 82168^2 .

It is a cyclic number.

It is not a de Polignac number, because 16411521449 - 2⁴ = 16411521433 is a prime.

It is not a weakly prime, because it can be changed into another prime (16411521349) 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 as a sum of consecutive naturals, namely, 8205760724 + 8205760725.

It is an arithmetic number, because the mean of its divisors is an integer number (8205760725).

Almost surely, 2^16411521449 is an apocalyptic number.

It is an amenable number.

16411521449 is a deficient number, since it is larger than the sum of its proper divisors (1).

16411521449 is an equidigital number, since it uses as much as digits as its factorization.

16411521449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 38.

The spelling of 16411521449 in words is "sixteen billion, four hundred eleven million, five hundred twenty-one thousand, four hundred forty-nine".