6581107613 has 4 divisors (see below), whose sum is σ = 6586262460. Its totient is φ = 6575952768.

The previous prime is 6581107571. The next prime is 6581107627. The reversal of 6581107613 is 3167011856.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5619301444 + 961806169 = 74962^2 + 31013^2 .

It is a cyclic number.

It is not a de Polignac number, because 6581107613 - 2¹⁴ = 6581091229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6581107213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2575508 + ... + 2578061.

It is an arithmetic number, because the mean of its divisors is an integer number (1646565615).

Almost surely, 2^6581107613 is an apocalyptic number.

It is an amenable number.

6581107613 is a deficient number, since it is larger than the sum of its proper divisors (5154847).

6581107613 is a wasteful number, since it uses less digits than its factorization.

6581107613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5154846.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 6581107613 is about 81124.0261143393. The cubic root of 6581107613 is about 1873.9859512779.

The spelling of 6581107613 in words is "six billion, five hundred eighty-one million, one hundred seven thousand, six hundred thirteen".