28015173117 has 24 divisors (see below), whose sum is σ = 41746525184. Its totient is φ = 18090467424.

The previous prime is 28015173077. The next prime is 28015173119. The reversal of 28015173117 is 71137151082.

28015173117 is a `hidden beast` number, since 28 + 0 + 1 + 517 + 3 + 117 = 666.

It is not a de Polignac number, because 28015173117 - 2²⁸ = 27746737661 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 (28015173119) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 114373 + ... + 262890.

Almost surely, 2^28015173117 is an apocalyptic number.

It is an amenable number.

28015173117 is a deficient number, since it is larger than the sum of its proper divisors (13731352067).

28015173117 is a wasteful number, since it uses less digits than its factorization.

28015173117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377529 (or 377526 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 36.

The spelling of 28015173117 in words is "twenty-eight billion, fifteen million, one hundred seventy-three thousand, one hundred seventeen".