11028665709 has 6 divisors (see below), whose sum is σ = 15930294926. Its totient is φ = 7352443800.

The previous prime is 11028665701. The next prime is 11028665723. The reversal of 11028665709 is 90756682011.

11028665709 is a `hidden beast` number, since 1 + 10 + 2 + 8 + 66 + 570 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 7069110084 + 3959555625 = 84078^2 + 62925^2 .

It is not a de Polignac number, because 11028665709 - 2³ = 11028665701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11028665701) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 612703642 + ... + 612703659.

Almost surely, 2^11028665709 is an apocalyptic number.

It is an amenable number.

11028665709 is a deficient number, since it is larger than the sum of its proper divisors (4901629217).

11028665709 is a wasteful number, since it uses less digits than its factorization.

11028665709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1225407307 (or 1225407304 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The spelling of 11028665709 in words is "eleven billion, twenty-eight million, six hundred sixty-five thousand, seven hundred nine".