28116536737 has 12 divisors (see below), whose sum is σ = 30939111280. Its totient is φ = 25478591688.

The previous prime is 28116536719. The next prime is 28116536741. The reversal of 28116536737 is 73763561182.

It is a de Polignac number, because none of the positive numbers 2^k-28116536737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28116536797) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1388643 + ... + 1408744.

Almost surely, 2^28116536737 is an apocalyptic number.

It is an amenable number.

28116536737 is a deficient number, since it is larger than the sum of its proper divisors (2822574543).

28116536737 is a wasteful number, since it uses less digits than its factorization.

28116536737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2797452 (or 2797429 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 49.

The spelling of 28116536737 in words is "twenty-eight billion, one hundred sixteen million, five hundred thirty-six thousand, seven hundred thirty-seven".