6121648109 has 2 divisors, whose sum is σ = 6121648110. Its totient is φ = 6121648108.

The previous prime is 6121648069. The next prime is 6121648153. The reversal of 6121648109 is 9018461216.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3364348009 + 2757300100 = 58003^2 + 52510^2 .

It is a cyclic number.

It is not a de Polignac number, because 6121648109 - 2⁸ = 6121647853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6121648199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3060824054 + 3060824055.

It is an arithmetic number, because the mean of its divisors is an integer number (3060824055).

Almost surely, 2^6121648109 is an apocalyptic number.

It is an amenable number.

6121648109 is a deficient number, since it is larger than the sum of its proper divisors (1).

6121648109 is an equidigital number, since it uses as much as digits as its factorization.

6121648109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 6121648109 is about 78240.9618358568. The cubic root of 6121648109 is about 1829.3190364538.

The spelling of 6121648109 in words is "six billion, one hundred twenty-one million, six hundred forty-eight thousand, one hundred nine".