6548991373 has 2 divisors, whose sum is σ = 6548991374. Its totient is φ = 6548991372.

The previous prime is 6548991353. The next prime is 6548991467. The reversal of 6548991373 is 3731998456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5864802724 + 684188649 = 76582^2 + 26157^2 .

It is a cyclic number.

It is not a de Polignac number, because 6548991373 - 2⁵ = 6548991341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6548991353) 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 as a sum of consecutive naturals, namely, 3274495686 + 3274495687.

It is an arithmetic number, because the mean of its divisors is an integer number (3274495687).

Almost surely, 2^6548991373 is an apocalyptic number.

It is an amenable number.

6548991373 is a deficient number, since it is larger than the sum of its proper divisors (1).

6548991373 is an equidigital number, since it uses as much as digits as its factorization.

6548991373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4898880, while the sum is 55.

The square root of 6548991373 is about 80925.8387228702. The cubic root of 6548991373 is about 1870.9325872502.

The spelling of 6548991373 in words is "six billion, five hundred forty-eight million, nine hundred ninety-one thousand, three hundred seventy-three".