28668037613 has 16 divisors (see below), whose sum is σ = 29121422400. Its totient is φ = 28218892416.

The previous prime is 28668037603. The next prime is 28668037621. The reversal of 28668037613 is 31673086682.

It is a cyclic number.

It is not a de Polignac number, because 28668037613 - 2⁴ = 28668037597 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 (28668037603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19330370 + ... + 19331852.

It is an arithmetic number, because the mean of its divisors is an integer number (1820088900).

Almost surely, 2^28668037613 is an apocalyptic number.

It is an amenable number.

28668037613 is a deficient number, since it is larger than the sum of its proper divisors (453384787).

28668037613 is a wasteful number, since it uses less digits than its factorization.

28668037613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2716.

The product of its (nonzero) digits is 1741824, while the sum is 50.

The spelling of 28668037613 in words is "twenty-eight billion, six hundred sixty-eight million, thirty-seven thousand, six hundred thirteen".