28385378608105 has 16 divisors (see below), whose sum is σ = 35824662872064. Its totient is φ = 21561139679040.

The previous prime is 28385378608091. The next prime is 28385378608109. The reversal of 28385378608105 is 50180687358382.

It is a de Polignac number, because none of the positive numbers 2^k-28385378608105 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28385378608109) 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, 1727647209 + ... + 1727663638.

It is an arithmetic number, because the mean of its divisors is an integer number (2239041429504).

Almost surely, 2^{28385378608105} is an apocalyptic number.

It is an amenable number.

28385378608105 is a deficient number, since it is larger than the sum of its proper divisors (7439284263959).

28385378608105 is a wasteful number, since it uses less digits than its factorization.

28385378608105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3455310936.

The product of its (nonzero) digits is 77414400, while the sum is 64.

The spelling of 28385378608105 in words is "twenty-eight trillion, three hundred eighty-five billion, three hundred seventy-eight million, six hundred eight thousand, one hundred five".