28135010181 has 8 divisors (see below), whose sum is σ = 37515693024. Its totient is φ = 18755500400.

The previous prime is 28135010143. The next prime is 28135010237. The reversal of 28135010181 is 18101053182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28135010181 - 2⁶ = 28135010117 is a prime.

It is a super-2 number, since 2×28135010181² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28135010681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235686 + ... + 334391.

It is an arithmetic number, because the mean of its divisors is an integer number (4689461628).

Almost surely, 2^28135010181 is an apocalyptic number.

It is an amenable number.

28135010181 is a deficient number, since it is larger than the sum of its proper divisors (9380682843).

28135010181 is a wasteful number, since it uses less digits than its factorization.

28135010181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586531.

The product of its (nonzero) digits is 1920, while the sum is 30.

The spelling of 28135010181 in words is "twenty-eight billion, one hundred thirty-five million, ten thousand, one hundred eighty-one".