28668052519 has 4 divisors (see below), whose sum is σ = 28893785344. Its totient is φ = 28442319696.

The previous prime is 28668052507. The next prime is 28668052531. The reversal of 28668052519 is 91525086682.

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

It is an interprime number because it is at equal distance from previous prime (28668052507) and next prime (28668052531).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28668052519 is a prime.

It is a super-2 number, since 2×28668052519² (a number of 22 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 (28668052579) 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, 112866222 + ... + 112866475.

It is an arithmetic number, because the mean of its divisors is an integer number (7223446336).

Almost surely, 2^28668052519 is an apocalyptic number.

28668052519 is a deficient number, since it is larger than the sum of its proper divisors (225732825).

28668052519 is a wasteful number, since it uses less digits than its factorization.

28668052519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225732824.

The product of its (nonzero) digits is 2073600, while the sum is 52.

The spelling of 28668052519 in words is "twenty-eight billion, six hundred sixty-eight million, fifty-two thousand, five hundred nineteen".