1115565660 has 72 divisors (see below), whose sum is σ = 3691514736. Its totient is φ = 270439680.

The previous prime is 1115565637. The next prime is 1115565667. The reversal of 1115565660 is 665655111.

1115565660 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×1115565660³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115565667) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 279729 + ... + 283688.

It is an arithmetic number, because the mean of its divisors is an integer number (51271038).

Almost surely, 2^1115565660 is an apocalyptic number.

1115565660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1115565660 is an abundant number, since it is smaller than the sum of its proper divisors (2575949076).

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

1115565660 is a wasteful number, since it uses less digits than its factorization.

1115565660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563443 (or 563438 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The square root of 1115565660 is about 33400.0847304314. The cubic root of 1115565660 is about 1037.1264549658.

The spelling of 1115565660 in words is "one billion, one hundred fifteen million, five hundred sixty-five thousand, six hundred sixty".