28651298065 has 8 divisors (see below), whose sum is σ = 37026292968. Its totient is φ = 21157881600.

The previous prime is 28651298029. The next prime is 28651298141. The reversal of 28651298065 is 56089215682.

It can be written as a sum of positive squares in 4 ways, for example, as 370485504 + 28280812561 = 19248^2 + 168169^2 .

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

It is not a de Polignac number, because 28651298065 - 2¹¹ = 28651296017 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220394536 + ... + 220394665.

It is an arithmetic number, because the mean of its divisors is an integer number (4628286621).

Almost surely, 2^28651298065 is an apocalyptic number.

It is an amenable number.

28651298065 is a deficient number, since it is larger than the sum of its proper divisors (8374994903).

28651298065 is a wasteful number, since it uses less digits than its factorization.

28651298065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440789219.

The product of its (nonzero) digits is 2073600, while the sum is 52.

The spelling of 28651298065 in words is "twenty-eight billion, six hundred fifty-one million, two hundred ninety-eight thousand, sixty-five".