6615201613 has 2 divisors, whose sum is σ = 6615201614. Its totient is φ = 6615201612.

The previous prime is 6615201611. The next prime is 6615201643. The reversal of 6615201613 is 3161025166.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6480572004 + 134629609 = 80502^2 + 11603^2 .

It is a cyclic number.

It is not a de Polignac number, because 6615201613 - 2¹ = 6615201611 is a prime.

Together with 6615201611, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6615201611) 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, 3307600806 + 3307600807.

It is an arithmetic number, because the mean of its divisors is an integer number (3307600807).

Almost surely, 2^6615201613 is an apocalyptic number.

It is an amenable number.

6615201613 is a deficient number, since it is larger than the sum of its proper divisors (1).

6615201613 is an equidigital number, since it uses as much as digits as its factorization.

6615201613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 6615201613 is about 81333.8896955015. The cubic root of 6615201613 is about 1877.2164946808.

Adding to 6615201613 its reverse (3161025166), we get a palindrome (9776226779).

The spelling of 6615201613 in words is "six billion, six hundred fifteen million, two hundred one thousand, six hundred thirteen".