28513702719689 has 16 divisors (see below), whose sum is σ = 31533299917440. Its totient is φ = 25565375986560.

The previous prime is 28513702719599. The next prime is 28513702719781. The reversal of 28513702719689 is 98691720731582.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28513702719689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28513702719389) 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, 18538067 + ... + 20017175.

It is an arithmetic number, because the mean of its divisors is an integer number (1970831244840).

Almost surely, 2^{28513702719689} is an apocalyptic number.

It is an amenable number.

28513702719689 is a deficient number, since it is larger than the sum of its proper divisors (3019597197751).

28513702719689 is a wasteful number, since it uses less digits than its factorization.

28513702719689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1503200.

The product of its (nonzero) digits is 91445760, while the sum is 68.

The spelling of 28513702719689 in words is "twenty-eight trillion, five hundred thirteen billion, seven hundred two million, seven hundred nineteen thousand, six hundred eighty-nine".