1128575565 has 64 divisors (see below), whose sum is σ = 2166124800. Its totient is φ = 554211072.

The previous prime is 1128575561. The next prime is 1128575573. The reversal of 1128575565 is 5655758211.

1128575565 is a `hidden beast` number, since 1 + 1 + 2 + 85 + 7 + 5 + 565 = 666.

It is not a de Polignac number, because 1128575565 - 2² = 1128575561 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1128575565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128575561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1243842 + ... + 1244748.

It is an arithmetic number, because the mean of its divisors is an integer number (33845700).

Almost surely, 2^1128575565 is an apocalyptic number.

1128575565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1128575565 is a deficient number, since it is larger than the sum of its proper divisors (1037549235).

1128575565 is a wasteful number, since it uses less digits than its factorization.

1128575565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1643 (or 1637 counting only the distinct ones).

The product of its digits is 420000, while the sum is 45.

The square root of 1128575565 is about 33594.2787539783. The cubic root of 1128575565 is about 1041.1425943910.

The spelling of 1128575565 in words is "one billion, one hundred twenty-eight million, five hundred seventy-five thousand, five hundred sixty-five".