6547909849 has 8 divisors (see below), whose sum is σ = 7066897992. Its totient is φ = 6031107840.

The previous prime is 6547909843. The next prime is 6547909877. The reversal of 6547909849 is 9489097456.

It can be written as a sum of positive squares in 4 ways, for example, as 199007449 + 6348902400 = 14107^2 + 79680^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6547909849 - 2⁵ = 6547909817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6547909843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 540304 + ... + 552289.

It is an arithmetic number, because the mean of its divisors is an integer number (883362249).

Almost surely, 2^6547909849 is an apocalyptic number.

It is an amenable number.

6547909849 is a deficient number, since it is larger than the sum of its proper divisors (518988143).

6547909849 is a wasteful number, since it uses less digits than its factorization.

6547909849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1093067.

The product of its (nonzero) digits is 19595520, while the sum is 61.

The square root of 6547909849 is about 80919.1562548696. The cubic root of 6547909849 is about 1870.8295907337.

The spelling of 6547909849 in words is "six billion, five hundred forty-seven million, nine hundred nine thousand, eight hundred forty-nine".