8426556249 has 4 divisors (see below), whose sum is σ = 11235408336. Its totient is φ = 5617704164.

The previous prime is 8426556247. The next prime is 8426556293. The reversal of 8426556249 is 9426556248.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8426556249 - 2¹ = 8426556247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8426556247) 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 in 3 ways as a sum of consecutive naturals, for example, 1404426039 + ... + 1404426044.

It is an arithmetic number, because the mean of its divisors is an integer number (2808852084).

Almost surely, 2^8426556249 is an apocalyptic number.

It is an amenable number.

8426556249 is a deficient number, since it is larger than the sum of its proper divisors (2808852087).

8426556249 is a wasteful number, since it uses less digits than its factorization.

8426556249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2808852086.

The product of its digits is 4147200, while the sum is 51.

The square root of 8426556249 is about 91796.2757904698. The cubic root of 8426556249 is about 2034.9326565057.

Subtracting 8426556249 from its reverse (9426556248), we obtain a palindrome (999999999).

The spelling of 8426556249 in words is "eight billion, four hundred twenty-six million, five hundred fifty-six thousand, two hundred forty-nine".