28661005184449 has 8 divisors (see below), whose sum is σ = 31266956255040. Its totient is φ = 26055121638000.

The previous prime is 28661005184423. The next prime is 28661005184503. The reversal of 28661005184449 is 94448150016682.

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 28661005184449 - 2¹⁷ = 28661005053377 is a prime.

It is a super-2 number, since 2×28661005184449² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28661005184393 and 28661005184402.

It is not an unprimeable number, because it can be changed into a prime (28661005184249) 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 7 ways as a sum of consecutive naturals, for example, 15991494 + ... + 17693215.

It is an arithmetic number, because the mean of its divisors is an integer number (3908369531880).

Almost surely, 2^{28661005184449} is an apocalyptic number.

It is an amenable number.

28661005184449 is a deficient number, since it is larger than the sum of its proper divisors (2605951070591).

28661005184449 is a wasteful number, since it uses less digits than its factorization.

28661005184449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33762071.

The product of its (nonzero) digits is 13271040, while the sum is 58.

The spelling of 28661005184449 in words is "twenty-eight trillion, six hundred sixty-one billion, five million, one hundred eighty-four thousand, four hundred forty-nine".