28094184561 has 8 divisors (see below), whose sum is σ = 37459923424. Its totient is φ = 18728951040.

The previous prime is 28094184557. The next prime is 28094184563. The reversal of 28094184561 is 16548149082.

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

It is not a de Polignac number, because 28094184561 - 2² = 28094184557 is a prime.

It is a super-2 number, since 2×28094184561² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28094184561.

It is not an unprimeable number, because it can be changed into a prime (28094184563) 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, 31590 + ... + 239136.

It is an arithmetic number, because the mean of its divisors is an integer number (4682490428).

Almost surely, 2^28094184561 is an apocalyptic number.

It is an amenable number.

28094184561 is a deficient number, since it is larger than the sum of its proper divisors (9365738863).

28094184561 is a wasteful number, since it uses less digits than its factorization.

28094184561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252671.

The product of its (nonzero) digits is 552960, while the sum is 48.

The spelling of 28094184561 in words is "twenty-eight billion, ninety-four million, one hundred eighty-four thousand, five hundred sixty-one".