6615253409 has 2 divisors, whose sum is σ = 6615253410. Its totient is φ = 6615253408.

The previous prime is 6615253369. The next prime is 6615253453. The reversal of 6615253409 is 9043525166.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3570421009 + 3044832400 = 59753^2 + 55180^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6615253409 is a prime.

It is a super-2 number, since 2×6615253409² = 87523155330572242562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6615153409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3307626704 + 3307626705.

It is an arithmetic number, because the mean of its divisors is an integer number (3307626705).

Almost surely, 2^6615253409 is an apocalyptic number.

It is an amenable number.

6615253409 is a deficient number, since it is larger than the sum of its proper divisors (1).

6615253409 is an equidigital number, since it uses as much as digits as its factorization.

6615253409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 194400, while the sum is 41.

The square root of 6615253409 is about 81334.2081107328. The cubic root of 6615253409 is about 1877.2213941058.

The spelling of 6615253409 in words is "six billion, six hundred fifteen million, two hundred fifty-three thousand, four hundred nine".