6509378401 has 2 divisors, whose sum is σ = 6509378402. Its totient is φ = 6509378400.

The previous prime is 6509378383. The next prime is 6509378417. The reversal of 6509378401 is 1048739056.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4086277776 + 2423100625 = 63924^2 + 49225^2 .

It is a cyclic number.

It is not a de Polignac number, because 6509378401 - 2¹¹ = 6509376353 is a prime.

It is not a weakly prime, because it can be changed into another prime (6509378441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3254689200 + 3254689201.

It is an arithmetic number, because the mean of its divisors is an integer number (3254689201).

Almost surely, 2^6509378401 is an apocalyptic number.

It is an amenable number.

6509378401 is a deficient number, since it is larger than the sum of its proper divisors (1).

6509378401 is an equidigital number, since it uses as much as digits as its factorization.

6509378401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 6509378401 is about 80680.7188924343. The cubic root of 6509378401 is about 1867.1527108297.

The spelling of 6509378401 in words is "six billion, five hundred nine million, three hundred seventy-eight thousand, four hundred one".