28510193453389 has 4 divisors (see below), whose sum is σ = 28621128058524. Its totient is φ = 28399258848256.

The previous prime is 28510193453387. The next prime is 28510193453461. The reversal of 28510193453389 is 98335439101582.

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 25803016830889 + 2707176622500 = 5079667^2 + 1645350^2 .

It is a cyclic number.

It is not a de Polignac number, because 28510193453389 - 2¹ = 28510193453387 is a prime.

It is a super-2 number, since 2×28510193453389² (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 (28510193453387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55467302182 + ... + 55467302695.

It is an arithmetic number, because the mean of its divisors is an integer number (7155282014631).

Almost surely, 2^{28510193453389} is an apocalyptic number.

It is an amenable number.

28510193453389 is a deficient number, since it is larger than the sum of its proper divisors (110934605135).

28510193453389 is a wasteful number, since it uses less digits than its factorization.

28510193453389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110934605134.

The product of its (nonzero) digits is 27993600, while the sum is 61.

The spelling of 28510193453389 in words is "twenty-eight trillion, five hundred ten billion, one hundred ninety-three million, four hundred fifty-three thousand, three hundred eighty-nine".