28060641249 has 4 divisors (see below), whose sum is σ = 37414188336. Its totient is φ = 18707094164.

The previous prime is 28060641239. The next prime is 28060641281. The reversal of 28060641249 is 94214606082.

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 28060641249 - 2⁹ = 28060640737 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28060641249.

It is not an unprimeable number, because it can be changed into a prime (28060641209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4676773539 + ... + 4676773544.

It is an arithmetic number, because the mean of its divisors is an integer number (9353547084).

Almost surely, 2^28060641249 is an apocalyptic number.

It is an amenable number.

28060641249 is a deficient number, since it is larger than the sum of its proper divisors (9353547087).

28060641249 is an equidigital number, since it uses as much as digits as its factorization.

28060641249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9353547086.

The product of its (nonzero) digits is 165888, while the sum is 42.

The spelling of 28060641249 in words is "twenty-eight billion, sixty million, six hundred forty-one thousand, two hundred forty-nine".