1115505565 has 8 divisors (see below), whose sum is σ = 1342831320. Its totient is φ = 889588032.

The previous prime is 1115505539. The next prime is 1115505569. The reversal of 1115505565 is 5655055111.

It can be written as a sum of positive squares in 4 ways, for example, as 1214404 + 1114291161 = 1102^2 + 33381^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1115505565 - 2⁵ = 1115505533 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1115505565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115505569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 350310 + ... + 353479.

It is an arithmetic number, because the mean of its divisors is an integer number (167853915).

Almost surely, 2^1115505565 is an apocalyptic number.

It is an amenable number.

1115505565 is a deficient number, since it is larger than the sum of its proper divisors (227325755).

1115505565 is an equidigital number, since it uses as much as digits as its factorization.

1115505565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704111.

The product of its (nonzero) digits is 18750, while the sum is 34.

The square root of 1115505565 is about 33399.1850948492. The cubic root of 1115505565 is about 1037.1078314592.

It can be divided in two parts, 11 and 15505565, that multiplied together give a triangular number (170561215 = T₁₈₄₆₉).

The spelling of 1115505565 in words is "one billion, one hundred fifteen million, five hundred five thousand, five hundred sixty-five".