28116716250523 has 4 divisors (see below), whose sum is σ = 28289211442408. Its totient is φ = 27944221058640.

The previous prime is 28116716250509. The next prime is 28116716250533. The reversal of 28116716250523 is 32505261761182.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28116716250523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28116716250503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86247595698 + ... + 86247596023.

It is an arithmetic number, because the mean of its divisors is an integer number (7072302860602).

Almost surely, 2^{28116716250523} is an apocalyptic number.

28116716250523 is a deficient number, since it is larger than the sum of its proper divisors (172495191885).

28116716250523 is a wasteful number, since it uses less digits than its factorization.

28116716250523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172495191884.

The product of its (nonzero) digits is 1209600, while the sum is 49.

The spelling of 28116716250523 in words is "twenty-eight trillion, one hundred sixteen billion, seven hundred sixteen million, two hundred fifty thousand, five hundred twenty-three".