1128564665 has 8 divisors (see below), whose sum is σ = 1356387648. Its totient is φ = 901445040.

The previous prime is 1128564649. The next prime is 1128564677. The reversal of 1128564665 is 5664658211.

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

It is not a de Polignac number, because 1128564665 - 2⁴ = 1128564649 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, 172301 + ... + 178730.

It is an arithmetic number, because the mean of its divisors is an integer number (169548456).

Almost surely, 2^1128564665 is an apocalyptic number.

It is an amenable number.

1128564665 is a deficient number, since it is larger than the sum of its proper divisors (227822983).

1128564665 is an equidigital number, since it uses as much as digits as its factorization.

1128564665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351679.

The product of its digits is 345600, while the sum is 44.

The square root of 1128564665 is about 33594.1165235819. The cubic root of 1128564665 is about 1041.1392425283.

The spelling of 1128564665 in words is "one billion, one hundred twenty-eight million, five hundred sixty-four thousand, six hundred sixty-five".