28065307613 has 16 divisors (see below), whose sum is σ = 32170369536. Its totient is φ = 23984257920.

The previous prime is 28065307609. The next prime is 28065307631. The reversal of 28065307613 is 31670356082.

It is not a de Polignac number, because 28065307613 - 2² = 28065307609 is a prime.

It is a super-2 number, since 2×28065307613² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28065307643) 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 in 15 ways as a sum of consecutive naturals, for example, 7941995 + ... + 7945527.

It is an arithmetic number, because the mean of its divisors is an integer number (2010648096).

Almost surely, 2^28065307613 is an apocalyptic number.

It is an amenable number.

28065307613 is a deficient number, since it is larger than the sum of its proper divisors (4105061923).

28065307613 is a wasteful number, since it uses less digits than its factorization.

28065307613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6604.

The product of its (nonzero) digits is 181440, while the sum is 41.

The spelling of 28065307613 in words is "twenty-eight billion, sixty-five million, three hundred seven thousand, six hundred thirteen".