28112461665 has 16 divisors (see below), whose sum is σ = 45828618048. Its totient is φ = 14710419776.

The previous prime is 28112461661. The next prime is 28112461667. The reversal of 28112461665 is 56616421182.

It is a cyclic number.

It is not a de Polignac number, because 28112461665 - 2² = 28112461661 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28112461661) 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 15 ways as a sum of consecutive naturals, for example, 17679999 + ... + 17681588.

It is an arithmetic number, because the mean of its divisors is an integer number (2864288628).

Almost surely, 2^28112461665 is an apocalyptic number.

It is an amenable number.

28112461665 is a deficient number, since it is larger than the sum of its proper divisors (17716156383).

28112461665 is a wasteful number, since it uses less digits than its factorization.

28112461665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35361648.

The product of its digits is 138240, while the sum is 42.

The spelling of 28112461665 in words is "twenty-eight billion, one hundred twelve million, four hundred sixty-one thousand, six hundred sixty-five".