6509139930493 has 2 divisors, whose sum is σ = 6509139930494. Its totient is φ = 6509139930492.

The previous prime is 6509139930487. The next prime is 6509139930497. The reversal of 6509139930493 is 3940399319056.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5245464928804 + 1263675001689 = 2290298^2 + 1124133^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6509139930493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6509139930497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3254569965246 + 3254569965247.

It is an arithmetic number, because the mean of its divisors is an integer number (3254569965247).

Almost surely, 2^{6509139930493} is an apocalyptic number.

It is an amenable number.

6509139930493 is a deficient number, since it is larger than the sum of its proper divisors (1).

6509139930493 is an equidigital number, since it uses as much as digits as its factorization.

6509139930493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21257640, while the sum is 61.

The spelling of 6509139930493 in words is "six trillion, five hundred nine billion, one hundred thirty-nine million, nine hundred thirty thousand, four hundred ninety-three".