1163565128 has 16 divisors (see below), whose sum is σ = 2380019760. Its totient is φ = 528893200.

The previous prime is 1163565121. The next prime is 1163565133. The reversal of 1163565128 is 8215653611.

It is a junction number, because it is equal to n+sod(n) for n = 1163565091 and 1163565100.

It is not an unprimeable number, because it can be changed into a prime (1163565121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6611078 + ... + 6611253.

It is an arithmetic number, because the mean of its divisors is an integer number (148751235).

Almost surely, 2^1163565128 is an apocalyptic number.

It is an amenable number.

1163565128 is an abundant number, since it is smaller than the sum of its proper divisors (1216454632).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1163565128 is a wasteful number, since it uses less digits than its factorization.

1163565128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13222348 (or 13222344 counting only the distinct ones).

The product of its digits is 43200, while the sum is 38.

The square root of 1163565128 is about 34111.0704610688. The cubic root of 1163565128 is about 1051.7928939261.

The spelling of 1163565128 in words is "one billion, one hundred sixty-three million, five hundred sixty-five thousand, one hundred twenty-eight".