28541641529 has 8 divisors (see below), whose sum is σ = 29464925640. Its totient is φ = 27626351616.

The previous prime is 28541641493. The next prime is 28541641577. The reversal of 28541641529 is 92514614582.

It can be written as a sum of positive squares in 4 ways, for example, as 13496165929 + 15045475600 = 116173^2 + 122660^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28541641529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28541641729) 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, 1991294 + ... + 2005575.

It is an arithmetic number, because the mean of its divisors is an integer number (3683115705).

Almost surely, 2^28541641529 is an apocalyptic number.

It is an amenable number.

28541641529 is a deficient number, since it is larger than the sum of its proper divisors (923284111).

28541641529 is a wasteful number, since it uses less digits than its factorization.

28541641529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3997099.

The product of its digits is 691200, while the sum is 47.

The spelling of 28541641529 in words is "twenty-eight billion, five hundred forty-one million, six hundred forty-one thousand, five hundred twenty-nine".