1161565552 has 20 divisors (see below), whose sum is σ = 2572038256. Its totient is φ = 497813760.

The previous prime is 1161565541. The next prime is 1161565553. The reversal of 1161565552 is 2555651611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161565553) 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 3 ways as a sum of consecutive naturals, for example, 5185449 + ... + 5185672.

Almost surely, 2^1161565552 is an apocalyptic number.

It is an amenable number.

1161565552 is an abundant number, since it is smaller than the sum of its proper divisors (1410472704).

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

1161565552 is a wasteful number, since it uses less digits than its factorization.

1161565552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10371136 (or 10371130 counting only the distinct ones).

The product of its digits is 45000, while the sum is 37.

The square root of 1161565552 is about 34081.7480772334. The cubic root of 1161565552 is about 1051.1900496530.

The spelling of 1161565552 in words is "one billion, one hundred sixty-one million, five hundred sixty-five thousand, five hundred fifty-two".