5281539649 has 4 divisors (see below), whose sum is σ = 5559515440. Its totient is φ = 5003563860.

The previous prime is 5281539643. The next prime is 5281539667. The reversal of 5281539649 is 9469351825.

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 5281539649 - 2¹⁹ = 5281015361 is a prime.

It is a super-2 number, since 2×5281539649² = 55789322127918086402, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5281539596 and 5281539605.

It is not an unprimeable number, because it can be changed into a prime (5281539643) 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, 138987867 + ... + 138987904.

It is an arithmetic number, because the mean of its divisors is an integer number (1389878860).

Almost surely, 2^5281539649 is an apocalyptic number.

It is an amenable number.

5281539649 is a deficient number, since it is larger than the sum of its proper divisors (277975791).

5281539649 is a wasteful number, since it uses less digits than its factorization.

5281539649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277975790.

The product of its digits is 2332800, while the sum is 52.

The square root of 5281539649 is about 72674.2020871230. The cubic root of 5281539649 is about 1741.4867779603.

The spelling of 5281539649 in words is "five billion, two hundred eighty-one million, five hundred thirty-nine thousand, six hundred forty-nine".