6456616613 has 4 divisors (see below), whose sum is σ = 6796438560. Its totient is φ = 6116794668.

The previous prime is 6456616591. The next prime is 6456616631. The reversal of 6456616613 is 3166166546.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3166166546 = 2 ⋅1583083273.

It is a cyclic number.

It is not a de Polignac number, because 6456616613 - 2⁶ = 6456616549 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6453616613) 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 in 3 ways as a sum of consecutive naturals, for example, 169910945 + ... + 169910982.

It is an arithmetic number, because the mean of its divisors is an integer number (1699109640).

Almost surely, 2^6456616613 is an apocalyptic number.

It is an amenable number.

6456616613 is a deficient number, since it is larger than the sum of its proper divisors (339821947).

6456616613 is a wasteful number, since it uses less digits than its factorization.

6456616613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339821946.

The product of its digits is 466560, while the sum is 44.

The square root of 6456616613 is about 80353.0746953718. The cubic root of 6456616613 is about 1862.0942815979.

The spelling of 6456616613 in words is "six billion, four hundred fifty-six million, six hundred sixteen thousand, six hundred thirteen".