28165706008319 has 4 divisors (see below), whose sum is σ = 30726224736360. Its totient is φ = 25605187280280.

The previous prime is 28165706008213. The next prime is 28165706008373. The reversal of 28165706008319 is 91380060756182.

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-28165706008319 is a prime.

It is a super-2 number, since 2×28165706008319² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28165706008819) 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, 1280259364004 + ... + 1280259364025.

It is an arithmetic number, because the mean of its divisors is an integer number (7681556184090).

Almost surely, 2^{28165706008319} is an apocalyptic number.

28165706008319 is a deficient number, since it is larger than the sum of its proper divisors (2560518728041).

28165706008319 is a wasteful number, since it uses less digits than its factorization.

28165706008319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2560518728040.

The product of its (nonzero) digits is 4354560, while the sum is 56.

The spelling of 28165706008319 in words is "twenty-eight trillion, one hundred sixty-five billion, seven hundred six million, eight thousand, three hundred nineteen".