28186562141 has 4 divisors (see below), whose sum is σ = 28186911900. Its totient is φ = 28186212384.

The previous prime is 28186562099. The next prime is 28186562147. The reversal of 28186562141 is 14126568182.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 14126568182 = 2 ⋅7063284091.

It can be written as a sum of positive squares in 2 ways, for example, as 27571274116 + 615288025 = 166046^2 + 24805^2 .

It is a cyclic number.

It is not a de Polignac number, because 28186562141 - 2¹⁴ = 28186545757 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28186562092 and 28186562101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28186562147) 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, 14015 + ... + 237843.

It is an arithmetic number, because the mean of its divisors is an integer number (7046727975).

Almost surely, 2^28186562141 is an apocalyptic number.

It is an amenable number.

28186562141 is a deficient number, since it is larger than the sum of its proper divisors (349759).

28186562141 is a wasteful number, since it uses less digits than its factorization.

28186562141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349758.

The product of its digits is 184320, while the sum is 44.

The spelling of 28186562141 in words is "twenty-eight billion, one hundred eighty-six million, five hundred sixty-two thousand, one hundred forty-one".