28341568181 has 4 divisors (see below), whose sum is σ = 28359473472. Its totient is φ = 28323662892.

The previous prime is 28341568153. The next prime is 28341568187. The reversal of 28341568181 is 18186514382.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28341568181 - 2⁶ = 28341568117 is a prime.

It is a super-2 number, since 2×28341568181² (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 (28341568187) 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, 8950271 + ... + 8953436.

It is an arithmetic number, because the mean of its divisors is an integer number (7089868368).

Almost surely, 2^28341568181 is an apocalyptic number.

It is an amenable number.

28341568181 is a deficient number, since it is larger than the sum of its proper divisors (17905291).

28341568181 is a wasteful number, since it uses less digits than its factorization.

28341568181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17905290.

The product of its digits is 368640, while the sum is 47.

The spelling of 28341568181 in words is "twenty-eight billion, three hundred forty-one million, five hundred sixty-eight thousand, one hundred eighty-one".