6498537989 has 4 divisors (see below), whose sum is σ = 6565533324. Its totient is φ = 6431542656.

The previous prime is 6498537977. The next prime is 6498538027. The reversal of 6498537989 is 9897358946.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4493020900 + 2005517089 = 67030^2 + 44783^2 .

It is a cyclic number.

It is not a de Polignac number, because 6498537989 - 2⁴ = 6498537973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6498537289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33497522 + ... + 33497715.

It is an arithmetic number, because the mean of its divisors is an integer number (1641383331).

Almost surely, 2^6498537989 is an apocalyptic number.

It is an amenable number.

6498537989 is a deficient number, since it is larger than the sum of its proper divisors (66995335).

6498537989 is an equidigital number, since it uses as much as digits as its factorization.

6498537989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66995334.

The product of its digits is 117573120, while the sum is 68.

The square root of 6498537989 is about 80613.5099657619. The cubic root of 6498537989 is about 1866.1156455482.

The spelling of 6498537989 in words is "six billion, four hundred ninety-eight million, five hundred thirty-seven thousand, nine hundred eighty-nine".