8541551449 has 2 divisors, whose sum is σ = 8541551450. Its totient is φ = 8541551448.

The previous prime is 8541551429. The next prime is 8541551503. The reversal of 8541551449 is 9441551458.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7884552025 + 656999424 = 88795^2 + 25632^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8541551449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8541551399 and 8541551408.

It is not a weakly prime, because it can be changed into another prime (8541551419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4270775724 + 4270775725.

It is an arithmetic number, because the mean of its divisors is an integer number (4270775725).

Almost surely, 2^8541551449 is an apocalyptic number.

It is an amenable number.

8541551449 is a deficient number, since it is larger than the sum of its proper divisors (1).

8541551449 is an equidigital number, since it uses as much as digits as its factorization.

8541551449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576000, while the sum is 46.

The square root of 8541551449 is about 92420.5142216813. The cubic root of 8541551449 is about 2044.1476112755.

Subtracting 8541551449 from its reverse (9441551458), we obtain a palindrome (900000009).

The spelling of 8541551449 in words is "eight billion, five hundred forty-one million, five hundred fifty-one thousand, four hundred forty-nine".