28250165693 has 4 divisors (see below), whose sum is σ = 28456371420. Its totient is φ = 28043959968.

The previous prime is 28250165641. The next prime is 28250165707. The reversal of 28250165693 is 39656105282.

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

It can be written as a sum of positive squares in 2 ways, for example, as 20358153124 + 7892012569 = 142682^2 + 88837^2 .

It is a cyclic number.

It is not a de Polignac number, because 28250165693 - 2¹⁰ = 28250164669 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 (28250165393) 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, 103102658 + ... + 103102931.

It is an arithmetic number, because the mean of its divisors is an integer number (7114092855).

Almost surely, 2^28250165693 is an apocalyptic number.

It is an amenable number.

28250165693 is a deficient number, since it is larger than the sum of its proper divisors (206205727).

28250165693 is a wasteful number, since it uses less digits than its factorization.

28250165693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206205726.

The product of its (nonzero) digits is 777600, while the sum is 47.

The spelling of 28250165693 in words is "twenty-eight billion, two hundred fifty million, one hundred sixty-five thousand, six hundred ninety-three".